Investments in LIHTC: Amount of future funding commitments included in carrying amount Investment Program, Proportional Amortization Method, Elected, Commitment Future minimum lease payments Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Restricted Stock Units Restricted Stock Units [Abstract] Restricted Stock Units 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Repayment of long-term debt Repayments of Long-Term Debt Share repurchase program, remaining authorized, amount Share Repurchase Program, Remaining Authorized, Amount Estimated aggregate amortization expense for future periods Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Vested / Exercised (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other than Options Exercisable Weighted Average Grant Date Fair Value This element represents share based compensation arrangement by share based payment award equity instruments other than options exercisable weighted average grant date fair value. Income tax expense on pretax income at statutory rates Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Cover [Abstract] Cover [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Mortgage banking - loan commitment Mortgage Banking Loan Commitment [Member] Represents information of mortgage banking - loan commitment. Net (losses) gains from sale of other loans Gain (Loss) on Sales of Loans, Net Discount rate Measurement Input, Discount Rate [Member] Schedule of Future Minimum Lease Payments Under Operating Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Allowance for credit losses, AFS portfolio Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Short-term borrowings Interest Expense, Other Short-Term Borrowings Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Gain (loss) recognized on hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Trading Symbol Trading Symbol Fair value hedging Fair value hedging of interest rate risk Fair Value Hedging [Member] Pledged Status [Domain] Pledged Status [Domain] Total gross derivative instruments Derivative Asset, Subject to Master Netting Arrangement, before Offset Non-NEOs Non-NEOs [Member] Deferred income tax benefit related to compensation expense for awards Share-Based Payment Arrangement, Expense, Tax Benefit Servicing liabilities Servicing Liability Common stock dividends (in dollars per share) Cash dividend declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Community First Capital Trust II Community First Capital Trust Two [Member] Community First Capital Trust Two Fair value hedge Fair Value Hedge Assets Disposal Group Name [Domain] Disposal Group Name [Domain] Weighted average payment delay term (in months) Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Service charges and other related fees Noninterest Income, Other Earnings Per Common Share Earnings Per Share, Policy [Policy Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Hedging Relationship [Domain] Hedging Relationship [Domain] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Fair Value Measurements Fair Value Disclosures [Text Block] Unrealized holding gains (losses), Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Award Timing Disclosures [Line Items] Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Investment, Name [Domain] Investment, Name [Domain] Total gains and losses Derivative, Gain (Loss) on Derivative, Net Schedule of balance and activity in the ACL by portfolio segment Financing Receivable, Allowance for Credit Loss [Table Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Operating lease income and expense Lease, Cost [Abstract] Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Net interest revenue Interest Income (Expense), Operating Total capital, Minimum Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum PCD loans: Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract] Schedule of Changes In Residential Mortgage Servicing Rights Servicing Asset at Amortized Cost [Table Text Block] Fair value hedge basis adjustment Hedge Accounting Basis Adjustment Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease), Excluded from Amortized Cost Securities Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss Operating Segments Segment Reporting, Policy [Policy Text Block] Wealth management fees Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions Premises and equipments Property, Plant and Equipment, Net, by Type [Abstract] Leases [Abstract] Leases [Abstract] Vested / Exercised, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Pledged Status [Axis] Pledged Status [Axis] Average total assets Regulatory Asset Intangibles subject to amortization, gross Finite-Lived Intangible Assets, Gross Originated five or more years prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Effect of hedging relationships on interest expense: Summary of Derivative Instruments Impact on Results of Operations [Abstract] Probability of achievement Probability Of Achievement [Member] Probability Of Achievement Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Receivable Type [Axis] Receivable Type [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Award Timing Method Award Timing Method [Text Block] Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Liabilities assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Measurement Frequency [Axis] Measurement Frequency [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total loans excluding fair value hedge basis adjustment Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Insider Trading Policies and Procedures [Line Items] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Proceeds from divestiture of businesses Proceeds from Divestiture of Businesses Use of Estimates Use of Estimates, Policy [Policy Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Four Oaks Statutory Trust I Four Oaks Statutory Trust One [Member] Represents information about Four Oaks Statutory Trust I. Compensation Amount Outstanding Recovery Compensation Amount Payment Delay Payment Deferral [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Entity Small Business Entity Small Business Company Selected Measure Amount Company Selected Measure Amount Revolvers converted to term loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Net activity, Net of Tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, After Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, After Tax Tabular List, Table Tabular List [Table Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] 2029 Time Deposit Maturities, Year Five Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Net defined benefit pension plan activity, Before-tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent Potentially dilutive instruments outstanding not included in EPS analysis (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Purchases Payments to Acquire Held-to-Maturity Securities Revolvers Financing Receivable, Excluding Accrued Interest, Revolving Mutual funds Mutual Funds, Fair Value Disclosure Mutual Funds, Fair Value Disclosure Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Mortgage banking - forward sales commitment Mortgage Banking Forward Sales Commitment [Member] Represents mortgage banking - forward sales commitment. Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Goodwill Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Proceeds from other investments Proceeds from Sale of Other Investments Cash paid for shares withheld to cover payroll taxes related to equity instruments Payment, Tax Withholding, Share-Based Payment Arrangement Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Repurchase program authorized amount Share Repurchase Program, Authorized, Amount Residential Residential Portfolio Segment [Member] Disposals Servicing Asset at Fair Value, Disposals Preferred stock redemption price (in dollars per share) Preferred Stock, Redemption Price Per Share Schedule of presentation of assets measured at fair value on nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Interest-bearing deposits Interest-Bearing Deposit Liabilities Options Stock options Share-Based Payment Arrangement, Option [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Debt Securities, Available For Sale And Held To Maturity [Line Items] Debt Securities, Available For Sale And Held To Maturity [Line Items] Debt Securities, Available For Sale And Held To Maturity [Line Items] Other expense Other Expenses Comprehensive income (loss), Net of Tax Amount Comprehensive Income (Loss), Net of Tax, Attributable to Parent Not designated as hedging instrument, economic hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Servicing Assets and Liabilities Transfers and Servicing of Financial Assets [Text Block] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Schedule of Amortized Cost And Fair Value of Afs and Htm Securities By Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Award Type [Axis] Award Type [Axis] Corporate bonds Corporate Bonds Corporate Debt Securities [Member] Proceeds from sales and maturities of debt securities available-for-sale and equity securities with readily determinable fair values Proceeds from Sale and Maturity, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Nonaccrual loans Nonaccrual Status [Abstract] Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Residential MBS, Agency & GSE Residential Mortgage-Backed Securities, Issued By US Government Sponsored Enterprises [Member] Debt securities collateralized by residential real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). Acquisitions: Noncash or Part Noncash Acquisitions [Abstract] Noncash or Part Noncash Acquisitions Premises and equipment, net Premises and equipment, net Property, Plant and Equipment, Net ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Total liabilities Total liabilities Liabilities Vested / Exercised (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Extension Extension [Member] Extension Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Fair Value, Less than 12 Months Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Expected useful life of acquired intangible (in years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Reclassification of unrealized losses, Tax (Expense) Benefit Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, Tax Expiration Date Trading Arrangement Expiration Date Sales and settlements Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales And Settlements Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales And Settlements Derivative assets Derivative Financial Instruments, Assets [Member] 100 bps adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Other Noninterest Income, Other Operating Income Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Goodwill and other intangible assets Intangible Assets, Net (Including Goodwill) [Abstract] Total Shareholder Return Amount Total Shareholder Return Amount Investment Program, Proportional Amortization Method, Elected Income Tax Credit And Other Income Tax Benefit, Before Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Investment Program, Proportional Amortization Method, Elected Income Tax Credit And Other Income Tax Benefit, Before Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Investment Program, Proportional Amortization Method, Elected Income Tax Credit And Other Income Tax Benefit, Before Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Differences between the provision for income taxes and statutory federal income tax rate Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Preferred stock, liquidation preference Preferred Stock, Liquidation Preference, Value Cash and due from banks Cash and Due from Banks Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Transfers from Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards 2027 Sales-Type and Direct Financing Leases, Payment to be Received, Year Three Gross gains on sales Debt Securities, Available-for-Sale, Realized Gain Other assets, fair value Other Assets, Fair Value Disclosure Other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Subsequent Event [Line Items] Subsequent Event [Line Items] Premises and equipment, gross Property, Plant and Equipment, Gross Retirement Plan Name [Axis] Retirement Plan Name [Axis] Vested / Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period HTM, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Rolling Maturity [Abstract] Unrealized holding gains on derivatives, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Debt Instrument [Line Items] Debt Instrument [Line Items] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Options, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Other assets (including $69,137 and $61,527 at fair value, respectively) Other assets Other Assets Decreases resulting from a lapse in the applicable statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Schedule of Htm Debt Securities In An Unrealized Loss Position Unrealized Gain Loss On Held To Maturity Securities [Table Text Block] Unrealized gain loss on held to maturity securities. Begin to expire in 2027 Net Operating Loss Carry Forwards Begin To Expire In 2027 [Member] Represents information of net operating loss carryforwards begin to expire in 2027. Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Net unrealized gains (losses), Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Salaries and employee benefit expense Salaries And Employee Benefit Expense [Member] Salaries And Employee Benefit Expense Schedule of Fair Value, Off-balance Sheet Risks [Table] Fair Value, off-Balance-Sheet Risk [Table] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Initial direct costs Sales Type And Direct Financing Leases, Initial Direct Costs Sales Type And Direct Financing Leases, Initial Direct Costs Net activity, Tax (Expense) Benefit Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, Tax Total shareholders’ equity Beginning balance Ending balance Shareholders’ equity Equity, Attributable to Parent Total DTAs Deferred Tax Assets, Gross Other financing outflows Payments For Other Financing Activities Payments For Other Financing Activities Originated in current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Schedule of Changes In The Carrying Amounts of Goodwill Schedule of Goodwill [Table Text Block] BOLI surrender Income Tax Reconciliation, Bank Owned Life Insurance Surrender Income Tax Reconciliation, Bank Owned Life Insurance Surrender Concentration Risk Type [Domain] Concentration Risk Type [Domain] AFS, Amortized Cost, Not due at single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Series I Non-Cumulative Preferred Stock Series I Non-Cumulative Preferred Stock [Member] Series I Non-Cumulative Preferred Stock Compensation expense related to 401(k) Plan Defined Contribution Plan, Cost Thereafter Sales-Type and Direct Financing Leases, Payment to be Received, after Year Five Document Fiscal Period Focus Document Fiscal Period Focus Merger-related and other charges Merger-related and other charges Business Combination, Acquisition Related Costs All Executive Categories All Executive Categories [Member] Dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Realized losses on AFS securities: AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Two Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Outstanding, Weighted Average Remaining Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount ASSETS Assets [Abstract] CET1 capital, Well Capitalized Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Document Type Document Type Derivative Contract [Domain] Derivative Contract [Domain] Actuarial (gains) losses Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Schedule Of Servicing Asset [Line Items] Schedule Of Servicing Asset [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Total ACL, Charge-Offs Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Writeoff Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Writeoff Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] HTM, Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Vested / Exercised, Weighted Average Remaining Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Net Investment in Leases Net Investment in Lease, before Allowance for Credit Loss [Abstract] Actual net income included since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Defined Benefit Plan [Table] Defined Benefit Plan [Table] Depreciation, amortization and accretion, net Depreciation, Amortization and Accretion, Net Subsequent Event [Table] Subsequent Event [Table] Loans Past Due, 60 - 89 Days Financial Asset, 60 to 89 Days Past Due [Member] Holding Company Parent Company [Member] Maximum High Maximum [Member] Schedule of condensed statements of cash flows Condensed Cash Flow Statement [Table Text Block] AFS debt securities: Debt Securities, Available-for-Sale [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Federal Home Loan Bank advances Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Federal Home Loan Bank Advances Represents amount of Federal Home Loan Bank advances recognized as of the acquisition date. Finite-lived intangible assets, net Total intangibles subject to amortization, net Finite-Lived Intangible Assets, Net Furniture and equipment Furniture and equipment Furniture and Fixtures [Member] Credit Loss Status [Axis] Credit Loss Status [Axis] Debt securities held-to-maturity (fair value $1,944,126 and $2,095,620, respectively) Debt Securities, Held-To-Maturity, Excluding Accrued Interest Debt Securities, Held-To-Maturity, Excluding Accrued Interest Bifurcated embedded derivatives and dealer offsets Bifurcated Embedded Derivatives And Dealer Offsets [Member] Bifurcated embedded derivatives and dealer offsets. Total lease cost Lease, Cost Hedged Portfolio Layer Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before equity in undistributed earnings of subsidiaries Income (Loss) Before Equity In Undistributed Earnings Of Subsidiaries Income (Loss) Before Equity In Undistributed Earnings Of Subsidiaries Income before income taxes Net income, Before-tax Amount Total before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Cash flow hedge of trust preferred securities Trust Preferred Securities Hedge [Member] Trust Preferred Securities Hedge Deferred Deferred Other Tax Expense (Benefit) Premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment Name Outstanding Recovery, Individual Name Variable lease cost Variable Lease, Cost FinTrust goodwill write-down FinTrust goodwill write-down Goodwill, Impairment Loss Real estate valuation changes Real Estate Valuation [Member] Real Estate Valuation Outstanding principal balance Mortgage Loans Held For Sale Outstanding Principal Balance Represents mortgage loans held for sale quantified by principal amount, the principle balance held at close of period. Title and Position [Axis] Title and Position [Axis] Accrued expenses and other liabilities (including $15,331 and $12,838 at fair value, respectively) Accrued Liabilities and Other Liabilities Tax credit investments Effective Income Tax Rate Reconciliation, Tax Credit, Amount Award Timing Predetermined Award Timing Predetermined [Flag] Schedule of minimum future lease payments expected to be received from equipment financing lease contracts Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Cash dividends on common stock Payments of Ordinary Dividends, Common Stock HTM, Amortized Cost, Within 1 year Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Investment, Name [Axis] Investment, Name [Axis] Customer relationship intangible Customer Relationships [Member] Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Forecast Forecast [Member] Long-term Debt and Short-term Borrowings Long-Term Debt [Text Block] Diluted (in dollars per share) Earnings Per Share, Diluted Revenue from Contracts with Customers Revenue from Contract with Customer [Policy Text Block] Schedule of Estimated Aggregate Amortization Expense For Future Periods Finite-Lived Intangible Assets Amortization Expense [Table Text Block] State State and Local Jurisdiction [Member] Performance-based restricted stock units Performance Based Restricted Stock Units [Member] Performance Based Restricted Stock Units [Member] Current Current Income Tax Expense (Benefit) Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration] Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration] Contractually specified servicing fees earned by United on servicing rights Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset Retirement Benefits [Abstract] Retirement Benefits [Abstract] Employer matching contribution maximum percent of employee's eligible compensation (percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Preferred stock, issued (in shares) Preferred Stock, Shares Issued Discount on preferred shares repurchased Discount On Preferred Shares Repurchased Discount On Preferred Shares Repurchased Amortization of unrealized losses, Before-tax amount OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax Comprehensive income (loss), Tax (Expense) Benefit Comprehensive Income Loss Tax Represents amount of comprehensive income loss tax. Statement of Financial Position [Abstract] Balance Sheet Statement of Financial Position [Abstract] Carrying Amount Financial Asset, Closed Portfolio, Portfolio Layer Method, Amortized Cost Asset-backed securities Asset-Backed Securities [Member] Deposits: Deposits [Abstract] Deposits [Abstract] Changes in fair value due to change in inputs or assumptions used in the valuation Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Other Deferred Tax Liabilities, Other Cash flow hedge Interest Rate Cash Flow Hedge Asset at Fair Value Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Income tax expense Net income, Tax (Expense) Benefit Income tax expense Total income tax expense Income tax benefit Income Tax Expense (Benefit) Interest cost Defined Benefit Plan, Interest Cost Financial instruments whose contract amounts represent credit risk: Unused Commitments to Extend Credit Notional Amount Derivative, Notional Amount AFS, Fair Value, More than 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Derivative financial instruments Derivative financial instruments Derivative Asset Loan portfolio Loan Portfolio [Member] Loan Portfolio [Member] Weighted-average recognition period for unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Depositary Shares, 1/1000th Of Preferred Share Depositary Shares, 1/1000th Of Preferred Share [Member] Depositary Shares, 1/1000th Of Preferred Share Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Decrease in other liabilities Increase (Decrease) in Other Noncurrent Liabilities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current period gross charge-offs, in prior year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Schedule of Amortized Cost Basis, Unrealized Gains and Losses And Fair Value of Htm Debt Securities Debt Securities, Held-to-Maturity [Table Text Block] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Deposits Deposits, Fair Value Disclosure Business Acquisition [Line Items] Business Acquisition [Line Items] Progress Progress Bank & Trust [Member] Progress Bank & Trust All Adjustments to Compensation All Adjustments to Compensation [Member] Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Core deposit intangible Core Deposits [Member] Capital surplus Additional Paid in Capital Number of HTM debt securities in unrealized loss position Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Mortgage Loans Held for Sale Mortgage Loans Held For Sale [Abstract] Mortgage Loans Held For Sale Purchase and credit card loans Guarantor Obligations, Maximum Exposure, Undiscounted Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Minimum future lease payments expected to be received Sales-Type and Direct Financing Leases, Payment to be Received, Fiscal Year Maturity [Abstract] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Scenario [Domain] Scenario [Domain] Schedule of condensed statements of income Condensed Income Statement [Table Text Block] Schedule of Rou Asset and Operating Lease Liability Schedule Of Right-Of-Use Assets And Lease Liabilities, Operating [Table Text Block] Schedule Of Right-Of-Use Assets And Lease Liabilities, Operating Gains (losses) on derivative instruments accounted for as cash flow hedges: Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Contingent consideration receivable Contingent Consideration Receivable [Member] Contingent Consideration Receivable Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity Address, State or Province Entity Address, State or Province Security deposits Sales Type And Direct Financing Leases, Security Deposits Sales Type And Direct Financing Leases, Security Deposits Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Originated three years prior Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Discretionary contributions to deferred compensation plan Deferred Compensation Arrangement With Individual, Discretionary Contributions by Employer Deferred Compensation Arrangement With Individual, Discretionary Contributions by Employer Comprehensive income (loss), Before-tax Amount Comprehensive Income Loss Before Tax Represents amount of comprehensive income (loss) before tax. Cash flow hedge of subordinated debt Interest Rate Contract. Subordinated Debt [Member] Interest Rate Contract. Subordinated Debt Disposal group, including discontinued operation, consideration Disposal Group, Including Discontinued Operation, Consideration Impact of other equity plans (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Stock Issued During Period, Shares, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Financial Instruments [Domain] Financial Instruments [Domain] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Beginning balance, outstanding (in dollars per share) Ending balance, outstanding (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income Schedule of Net Benefit Costs [Table Text Block] Current period gross charge-offs, five or more years prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Pledging Purpose [Axis] Pledging Purpose [Axis] Construction Commercial construction Construction Loans [Member] Unrealized Loss, 12 Months or More Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Restatement Determination Date Restatement Determination Date Fair Value Estimate of Fair Value Measurement [Member] Equipment financing Equipment financing receivables Equipment financing loans Equipment Financing [Member] Represents information related to equipment financing. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) Condensed Financial Information of Parent Company Only Disclosure [Text Block] 2029 subordinated debentures Two Thousand Twenty Nine Subordinated Debentures [Member] Two Thousand Twenty Nine Subordinated Debentures Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Advertising and public relations Marketing and Advertising Expense Beginning balance, outstanding (in dollars per share) Ending balance, outstanding (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price ROU asset Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Derivative Instruments [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Lease liability Deferred Tax Assets, Lease Liability Deferred Tax Assets, Lease Liability Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Service charges and fees Deposit Account [Member] Prior service cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Total expenses Condensed Income Statement, Total Expense Condensed Income Statement, Total Expense Earnings Per Share Earnings Per Share [Text Block] Interest per one share of preferred stock Interest Per One Share Of Preferred Stock Interest Per One Share Of Preferred Stock Subsequent Event [Member] Subsequent Event [Member] Unrealized holding gains on derivatives, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Granted/Assumed (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Income Taxes Income Tax, Policy [Policy Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Other Other Income Supranational entities Other Debt Obligations [Member] Interest revenue: Interest and Dividend Income, Operating [Abstract] Reconciliation of the beginning and ending unrecognized tax benefit Unrecognized Tax Benefits [Roll Forward] Provision for credit losses Provision for credit losses Total ACL, (Release) Provision Provision for Loan, Lease, and Other Losses Purchases of debt securities available-for-sale and equity securities with readily determinable fair values Payments To Acquire Available For Sale Securities Debt And Equity Securities Payments To Acquire Available For Sale Securities Debt And Equity Securities Rate Reduction and Payment Delay Rate Reduction And Payment Delay [Member] Rate Reduction And Payment Delay Mortgage loan gains and other related fees Fair Value, Option, Changes in Fair Value, Gain (Loss) PEO PEO [Member] Dividends from other subsidiaries Dividend Income, Received From Consolidated Subsidiaries, Other Dividend Income, Received From Consolidated Subsidiaries, Other ACL at acquisition ACL- loans, Initial ACL - PCD loans Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Name Trading Arrangement, Individual Name Funded status - end of year (plan assets less benefit obligations) Defined Benefit Plan, Funded (Unfunded) Status of Plan Deposits Interest Expense, Deposits Debt securities held-to-maturity: Debt Securities Held To Maturity [Abstract] Debt Securities Held To Maturity [Abstract] Investment in Bank Investments In Bank Represents amount related to Investments In Bank. Options converted Business Combination, Consideration Transferred, Converted Stock Options Business Combination, Consideration Transferred, Converted Stock Options Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Other Other expense Other Noninterest Expense Entity Public Float Entity Public Float Disposal Group Name [Axis] Disposal Group Name [Axis] Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Residential Mortgage And Manufactured Housing Residential Mortgage And Manufactured Housing [Member] Residential Mortgage And Manufactured Housing Accumulated benefit obligation - beginning of year Accumulated benefit obligation - end of year Defined Benefit Plan, Benefit Obligation Loans, including fees Interest and Fee Income, Loans and Leases Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Payment deferral period Financing Receivable, Modified, Payment Deferral, Weighted Average Period Financing Receivable, Modified, Payment Deferral, Weighted Average Period Reclassification of unrealized losses, Before-tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, Before Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, Before Tax Customer derivatives and dealer offsets Customer Derivatives And Dealer Offsets [Member] Information of Customer Derivatives And Dealer Offsets. AFS, Fair Value, 1 to 5 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Transfers of Financial Assets Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Sales, Policy [Policy Text Block] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Local Phone Number Local Phone Number Amortization of unrealized losses on HTM securities transferred from AFS: Accumulated Amortization Of Gains Included In Net Income On Available For Sale Securities Transferred To Held To Maturity [Member] Represents accumulated amortization of gains included in net income on available for sale securities transferred to held to maturity. Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Transfers from Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Less valuation allowance Valuation allowance Deferred Tax Assets, Valuation Allowance Unrealized gains on cash flow hedges Deferred Tax Liabilities, Unrealized Gain On Cash Flow Hedge Deferred Tax Liabilities, Unrealized Gain On Cash Flow Hedge Lending and loan servicing expense Loan Portfolio Expense Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] ACL - loans, Provision Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) BOLI earnings Income Tax Reconciliation, Bank Owned Life Insurance Earnings Income Tax Reconciliation, Bank Owned Life Insurance Earnings Reclassification of securities from available-for-sale to held-to-maturity, Net of Tax Amount Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, After Tax Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, After Tax Revolvers converted to term loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Originated four years prior Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Document Financial Statement Restatement Recovery Analysis [Flag] Document Financial Statement Restatement Recovery Analysis [Flag] Schedule of the contract amount of off-balance sheet instruments Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Interest revenue Interest Income [Member] Occupancy Occupancy, Net Total gross derivative instruments Derivative Liability, Subject to Master Netting Arrangement, before Offset Common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Schedule of carrying amount and cumulative fair value hedging adjustments on hedged liability Schedule Of Fair Value Hedging Instruments, Carrying Value And Basis Adjustments [Table Text Block] Schedule Of Fair Value Hedging Instruments, Carrying Value And Basis Adjustments [Table Text Block] Debt securities available-for-sale Fair Value Fair Value Debt securities available-for-sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Total other comprehensive income (loss), Before-tax Amount Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Total capital Banking Regulation, Total Risk-Based Capital Ratio, Actual (Increase) decrease in loans held for sale Increase (Decrease) in Loan, Held-for-Sale U.S. Government agencies & GSEs US Government-sponsored Enterprises Debt Securities [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Common stock, par value $1 per share Common Stock Common Stock [Member] AFS, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Total capital Banking Regulation, Total Capital, Actual Service period to receive matching contribution Defined Contribution Plan, Service Period To Qualify For Matching Contributions Defined Contribution Plan, Service Period To Qualify For Matching Contributions Schedule of tax credit and certain equity method investments Schedule Of Tax Credit and Certain Equity Method Investments [Table Text Block] Schedule Of Tax Credit and Certain Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Total ACL, Beginning Balance Total ACL, Ending Balance Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest And Off-Balance Sheet Credit Loss Liability Financing Receivable, Allowance For Credit Loss, Excluding Accrued Interest And Off-Balance Sheet Credit Loss Liability Debt securities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Derivatives designated as hedging instruments Derivative Instruments in Hedges, Assets, at Fair Value Entity Central Index Key Entity Central Index Key Loans held for sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Loans Held For Sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Loans Held For Sale Scenario [Axis] Scenario [Axis] Accrued penalties and interest Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Roll Forward] ACL - unfunded commitments, Beginning Balance ACL - unfunded commitments, Ending Balance Off-Balance-Sheet, Credit Loss, Liability Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Common and Preferred Stock Equity [Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Financial Instrument [Axis] Financial Instrument [Axis] Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] HTM, Amortized Cost, 1 to 5 years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Schedule of effect of derivatives in hedging relationships consolidated statements of income Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] CET1 capital, Minimum Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Executive officers, certain key employees, and board of directors Executive Officers, Certain Key Employees, Board Of Directors [Member] Executive Officers, Certain Key Employees, Board Of Directors [Member] Accounting Standards Updates and Recently Adopted Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Professional fees Professional Fees Measurement Basis [Axis] Measurement Basis [Axis] Loans, net Loans Receivable, Fair Value Disclosure Title Trading Arrangement, Individual Title Net activity, Before-tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, Before Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Adjustment, Before Tax Consolidated Entities [Axis] Consolidated Entities [Axis] Loans in bankruptcy status modified during period Financing Receivable, Excluding Accrued Interest, Loans In Bankruptcy Status Modified During Period Financing Receivable, Excluding Accrued Interest, Loans In Bankruptcy Status Modified During Period Balance at beginning of year Balance at end of year Unrecognized Tax Benefits Cash Flow [Line Items] Cash Flow [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. VIEs Consolidation, Variable Interest Entity, Policy [Policy Text Block] City Area Code City Area Code Equity in undistributed earnings of subsidiaries Equity in undistributed earnings of the subsidiaries Income (Loss) from Subsidiaries, Net of Tax Auditor Location Auditor Location Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities 2026 Time Deposit Maturities, Year Two Community First Capital Trust III Community First Capital Trust Three [Member] Community First Capital Trust Three Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of loans held for sale at fair value under the fair value option Fair Value Option, Disclosures [Table Text Block] Total ACL, Recoveries Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Recovery Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Recovery Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] HTM debt securities: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Preferred Stock Preferred Stock [Member] Accrued expenses and other liabilities, fair value Accounts Payable and Accrued Liabilities, Fair Value Disclosure Current period gross charge-offs, Total ACL - loans, Charge-Offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Other lending and loan servicing fees Other Lending And Loan Servicing Fees Other Lending And Loan Servicing Fees Net cash paid for branch disposal Net Cash Paid For Branch Disposal Net Cash Paid For Branch Disposal Derivative asset, measurement input Derivative Asset, Measurement Input Less: Amounts subject to master netting agreements Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Schedule of quantitative information about Level 3 fair value measurements for fair value on a recurring basis Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Restricted Stock Units, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Bank owned life insurance Bank Owned Life Insurance Subsequent Event Type [Axis] Subsequent Event Type [Axis] Income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Equity [Abstract] Equity [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Amortization of unrealized losses, Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), Tax Schedule of Minimum Amounts Required for Capital Adequacy Purposes Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] HTM, Fair Value, Not due at single maturity Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Rate Reduction Rate Reduction [Member] Rate Reduction Class of Stock [Domain] Class of Stock [Domain] HTM, Fair Value, Within 1 year Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Credit Loss Status [Domain] Credit Loss Status [Domain] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Operating lease liability Present value of lease liability Operating Lease, Liability Underlying Securities Award Underlying Securities Amount Deferred compensation plan liability Deferred Compensation Liability, Current and Noncurrent Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Commercial & industrial Commercial And Industrial Classification [Member] Commercial And Industrial Classification[Member] Derivative instruments designated as cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract] Conversion of Stock, Name [Domain] Conversion of Stock, Name [Domain] Common stock dividends Dividends, Common Stock, Cash Amendment Flag Amendment Flag Carrying Amount Reported Value Measurement [Member] Subordinated Debt [Member] Subordinated debentures Subordinated Debt [Member] Loans held for investment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Servicing Assets at Fair Value [Line Items] Servicing Assets at Fair Value [Line Items] Short-term borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short Term Borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short Term Borrowings Subsequent Events [Abstract] Subsequent Events [Abstract] Sales and settlements Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales And Settlements Amount of sale and settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. ACL - loans, Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Substandard Substandard [Member] Condensed Income Statement [Table] Condensed Income Statement [Table] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Loans and Leases Financing Receivable [Policy Text Block] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Discount rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Entity Address, Postal Zip Code Entity Address, Postal Zip Code Fintech funds and certain other equity method investments: Fintech And Other Equity Method Investments [Member] Fintech And Other Equity Method Investments Interest rate swaps Interest Rate Swap [Member] Dividend date of record Dividends Payable, Date of Record Contingent consideration receivable for FinTrust sale Consideration Received for Beneficial Interest Obtained for Transferring Financial Asset Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Rate Reduction Rate Reduction1 [Member] Rate Reduction1 FDIC assessments and other regulatory charges Federal Deposit Insurance Corporation Premium Expense Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Amortization expense Investment Program, Proportional Amortization Method, Applied, Amortization Expense Auditor Name Auditor Name Cancelled (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Gain on extinguishment of debt Gain on extinguishment of debt Gain (Loss) on Extinguishment of Debt Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Estimated useful life (in years) Property, Plant and Equipment, Useful Life Options, Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Guaranteed portion of SBA/USDA loans SBA USDA Guaranteed Loans [Member] SBA USDA Guaranteed Loans [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Assets acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Equity compensation Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount First Miami and Progress First Miami And Progress [Member] First Miami And Progress Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Derivative Assets Derivative Asset [Abstract] Shared service fees from subsidiaries Shared Service Fees From Subsidiaries Shared Service Fees From Subsidiaries Designated as hedging instrument Designated as Hedging Instrument [Member] Net income available to common shareholders, basic Net income available to common shareholders, basic Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Afs Debt Securities In An Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Weighted average common shares outstanding: Weighted average common shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Assets Schedule of Changes In Sba/Usda Servicing Rights Schedule of Servicing Assets at Fair Value [Table Text Block] (Gains) losses on derivative instruments realized in net income, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Entity Listings [Line Items] Entity Listings [Line Items] Classifications of loans Financing Receivable, after Allowance for Credit Loss [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Commitments and contingencies (Note 22 - Commitments and Contingencies) Commitments and Contingencies Stated Maturity Date Debt Instruments Maturity Year This element represents debt instruments maturity year. HTM Debt Securities, Held-To-Maturity [Member] Debt Securities, Held-To-Maturity Realized losses included in net income, Net of Tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Schedule of differences between the provision for income taxes and statutory federal income tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Mortgage loan gains and related fees Mortgage Banking [Member] Audit Information [Abstract] Audit Information Termination Date Trading Arrangement Termination Date Net assets acquired Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Uncertain tax positions Deferred Tax Liability Uncertain Tax Positions This element represents amount of deferred tax liability uncertain tax position. Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Dividends from Bank Dividend Income, Received From Consolidated Subsidiaries, Bank Dividend Income, Received From Consolidated Subsidiaries, Bank Other liabilities Other Liabilities Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Summary of HTM debt securities in an unrealized loss position Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract] Allowance for credit losses, HTM portfolio Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Schedule of purchased assets and assumed liabilities Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Net income Net income Net of tax Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Owner occupied CRE Owner occupied CRE Owner Occupied Commercial Real Estate [Member] Represents information of owner occupied commercial real estate. Schedule of carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis Fair Value, by Balance Sheet Grouping [Table Text Block] Originated two years prior Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year 2030-2034 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] SBA/USDA loans Loans Insured or Guaranteed by US Government Authorities [Member] Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Other investing inflows Proceeds From Other Investing Activities Proceeds From Other Investing Activities Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Common stock, issuable (in shares) Common Stock Issuable, Shares Represents number of shares of common stock issuable. Schedule of components of net investment in leases Schedule of Components of Leveraged Lease Investments [Table Text Block] Entity File Number Entity File Number Schedule of weighted-average assumptions used to determine pension benefit obligations Defined Benefit Plan, Assumptions [Table Text Block] Impact of other equity plans Stock Issued During Period, Value, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Stock Issued During Period, Value, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Tax exempt Interest Income, Securities, Operating, Tax Exempt Loans Held for Sale Financing Receivable, Held-for-Sale [Policy Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Income Statement [Abstract] Statement of Operations Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Computation of basic and diluted earnings per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Matching contributions to deferred compensation plan Deferred Compensation Arrangement with Individual, Contributions by Employer Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-Term Adjustment to reserve for uncertain tax positions Income Tax Reconciliation Change in Reserves for Uncertain Tax Positions This element represents amount of income tax reconciliation change in reserves for uncertain tax positions. (Decrease) increase in other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Name Forgone Recovery, Individual Name Vested / Exercised, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Purchase loans Financial Asset Acquired with Credit Deterioration [Member] Investments and Equity investments Investment, Policy [Policy Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] AFS, Fair Value, Not due at single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value DTLs: Components of Deferred Tax Liabilities [Abstract] Schedule of estimated future benefit payments expected to be paid Schedule of Expected Benefit Payments [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Risk Category [Domain] Risk Category [Domain] Risk Category [Domain] Tier 1 leverage ratio, Well Capitalized Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum Tidelands Statutory Trust I Tidelands Statutory Trust One [Member] Represents information of Tidelands statutory trust one. Land improvements Land Improvements [Member] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Dividend payable date Dividends Payable, Date to be Paid Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Adjustment to Compensation: Adjustment to Compensation [Axis] Servicing assets Deferred Tax Liabilities, Mortgage Servicing Rights Derivative Liabilities Derivative Liability [Abstract] ACL Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Financing Receivable, Allowance for Credit Loss Sale of FinTrust Goodwill, Written off Related to Sale of Business Unit Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] (Gains) losses on derivative instruments realized in net income, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Consumer Consumer Portfolio Segment [Member] Total interest expense Interest expense Interest Expense, Operating Par value Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value Net defined benefit pension plan activity, Net of Tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Schedule of loans modified under the terms of a TDR, including TDR loans that defaulted Financing Receivable, Modified [Table Text Block] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax AFS, Fair Value Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Fair value hedge Fair Value Hedge Liabilities Total Sales-Type and Direct Financing Leases, Payment to be Received Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] 2028 subordinated debentures Two Thousand Twenty Eight Subordinated Debentures [Member] Represents information of 2028 subordinated debentures. Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Unrealized holding gains (losses), Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Unrealized Loss, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Reclassifications Out of AOCI Disclosure of Reclassification Amount [Text Block] Securities losses, net Net losses on sales of securities Securities losses, net Debt Securities, Available-for-Sale, Realized Gain (Loss) Trust preferred securities debt issuance Deferred Tax Liabilities, Preferred Securities, Debt Issuance Costs Deferred Tax Liabilities, Preferred Securities, Debt Issuance Costs Premises and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Summary of sources and expected tax consequences of future taxable deductions (revenue) Components of Deferred Tax Assets and Liabilities [Abstract] Name Awards Close in Time to MNPI Disclosures, Individual Name Construction in progress Construction in Progress [Member] Gross contractual amounts receivable Business Combination, Acquired Receivables, Gross Contractual Amount Cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Unrealized Loss, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Repurchase of preferred stock Payments for Repurchase of Preferred Stock and Preference Stock Maximum remaining maturity of financial instruments having no defined maturity Maximum Remaining Maturity Of Financial Instruments Having No Defined Maturity Maximum remaining maturity of financial instruments having no defined maturity. Schedule of loans sold Schedule Of Financing Receivables Sold, Loans [Table Text Block] Schedule Of Financing Receivables Sold, Loans Entity Filer Category Entity Filer Category ACL - unfunded commitments, (Release) Provision Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] BOLI Bank Owned Life Insurance [Policy Text Block] Disclosure of accounting policy for information of Bank owned life insurance. 200 bps adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate FinTrust FinTrust [Member] FinTrust Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Acquisitions Goodwill, Acquired During Period Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Total ACL, Initial ACL - PCD loans Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Purchased With Credit Deterioration, Increase Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Purchased With Credit Deterioration, Increase Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Current period gross charge-offs, three years prior Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Schedule of Operating Lease Income and Expense and Other Supplemental Information Lease, Cost [Table Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Stock Options Stock Options [Abstract] Stock Options Debt Securities AFS Debt Securities AFS Debt Securities [Member] Schedule of loans by aging category and accrual status Financing Receivable, Past Due [Table Text Block] Director Director [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Tax benefit related to uncertain tax positions that increases income from continuing operations Unrecognized Tax Benefits that Would Impact Effective Tax Rate Reclassification of securities from available-for-sale to held-to-maturity, Tax (Expense) Benefit Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Tax Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Tax Fair Value, Total Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Residential MBS, Non-agency Residential Mortgage-Backed Securities, Issued By Private Enterprises [Member] Debt securities collateralized by residential real estate mortgage loans (mortgages), issued by non-governmental sponsored enterprises. Schedule of Computation of Basic and Diluted Net Income Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Plan vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period State tax credits Tax Credit Carryforward, Amount Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Interest expense - long term debt Long-Term Debt [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative [Line Items] Derivative [Line Items] Income taxes Income Taxes Paid, Net Other Commitments [Line Items] Other Commitments [Line Items] Goodwill adjustment Measurement period adjustment - First Miami Goodwill, Measurement Period Adjustment Carrying amount Equity Method Investments Pay vs Performance Disclosure [Line Items] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Residential MBS Residential MBS Residential Mortgage-Backed Securities [Member] Derivative [Table] Derivative [Table] Goodwill and other intangible assets, net Total goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Depositary shares, each representing 1/1000th interest in a share of Series I Non-Cumulative Preferred Stock Depositary share on Series I perpetual non-cumulative preferred stock Depositary Share On UCBI Series I Non-Cumulative Preferred Stock [Member] Depositary Share On UCBI Series I Non-Cumulative Preferred Stock Cash flow hedge Interest Rate Cash Flow Hedge Liability at Fair Value AFS, Amortized Cost, Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Premium amortization expense excluded from assessment of hedge effectiveness Loss from Components Excluded from Assessment of Cash Flow Hedge Effectiveness Deposits in banks and short-term investments Federal Funds Sold Commercial Paper and Deposits In Banks Represents amount of federal funds sold, commercial paper and deposits in banks. Time Deposits Deposit Liabilities Disclosures [Text Block] Other Performance Measure, Amount Other Performance Measure, Amount 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Three Goodwill [Line Items] Goodwill [Line Items] Operating Leases Lessee, Operating Leases [Text Block] Net unrealized gains (losses), Before-tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Common stock, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Begin to expire in 2025 Net Operating Loss Carry Forwards Begin To Expire In 2025 [Member] Net Operating Loss Carry Forwards Begin To Expire In 2025 Shares issued in connection with DRIP (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Supplementary Information on Acquired Loans Business Combination, Separately recognized Transactions, Additional Disclosures [Abstract] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Operating lease cost Operating Lease, Cost Bifurcated embedded derivatives Bifurcated Embedded Derivative [Member] Represents the bifurcated embedded derivatives. Pass Pass [Member] Additional awards remaining available under plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Transaction costs Income Tax Reconciliation Tax Transaction Costs Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to transaction costs. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Accrued interest receivable Interest Receivable Cash flow hedging Cash Flow Hedging [Member] Gross losses on sales Debt Securities, Available-for-Sale, Realized Loss BOLI Deferred Tax Liabilities, Bank Owned Life Insurance Deferred Tax Liabilities, Bank Owned Life Insurance 2030 senior debentures Two Thousand Thirty Senior Debentures [Member] Two Thousand Thirty Senior Debentures Investments in LIHTC: Investments In LIHTC [Member] Investments In LIHTC Service cost Defined Benefit Plan, Service Cost Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Entity Tax Identification Number Entity Tax Identification Number Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Accounting Standards Update and Change in Accounting Principle [Abstract] Loans and Leases and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Customer derivative positions Customer Swap Position [Member] Represents the customer swap positions. Net actuarial (loss) gain on defined benefit pension plans, Tax (Expense) Benefit Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Postage, printing and supplies Supplies and Postage Expense Total income Condensed Income Statement, Income Condensed Income Statement, Income Schedule of fair value of derivative financial instruments on consolidated balance sheet Schedule of Derivative Instruments [Table Text Block] Amortization of defined benefit pension plan net periodic pension cost components, Before-tax Amount Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Included In Net Periodic Pension Cost For Defined Benefit Pension Plan Before Tax Amount Represents amount of other comprehensive income (loss) amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, before tax amount. Net income per common share: Earnings Per Share Reconciliation [Abstract] U.S. Treasuries U.S. Treasuries US Treasury Securities [Member] AFS Fair value hedge of AFS debt securities Debt Securities, Available-For-Sale [Member] Debt Securities, Available-For-Sale Reclassification of unrealized losses, Net of Tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity, After Tax Equity Components [Axis] Equity Components [Axis] Supplemental consolidated pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Beginning of period End of period Fair value of retained servicing assets Servicing assets Servicing Asset at Fair Value, Amount Balance at beginning of period Balance at ending of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Receivable [Domain] Receivable [Domain] Outstanding, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Common stock issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Significant non-cash investing and financing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Extension from modification Financing Receivable, Modified, Extension From Modification Financing Receivable, Modified, Extension From Modification Servicing Rights Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Employee Employee [Member] Employee Net DTA Net DTA Deferred Tax Assets, Net 2029 Lessee, Operating Lease, Liability, to be Paid, Year Five Net cash flow hedge activity, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Consideration transferred Business Combination, Consideration Transferred [Abstract] Weighted average Weighted Average Weighted Average [Member] Residential mortgage Residential mortgage servicing rights Residential Mortgage [Member] Less: Cash collateral received/pledged Derivative Liability, Fair Value of Collateral Purchases of preferred stock Stock Repurchased During Period, Value Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other liabilities Other Liabilities [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Pledged securities Asset Pledged as Collateral [Member] Commercial MBS, Agency & GSE Commercial Mortgage-Backed Securities, Issued By US Government Sponsored Enterprises [Member] Debt securities collateralized by commercial real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). Fair Value, Total Debt Securities, Available-for-Sale, Unrealized Loss Position Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Revolvers Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Equity securities with readily determinable fair values Equity Securities, FV-NI, Current Estimate of contractual cash flows not expected to be collected Business Combination, Acquired Receivables, Estimated Uncollectible Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Net actuarial (loss) gain on defined benefit pension plans, Before-tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Gain (loss) recognized on derivatives Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments 2026 Sales-Type and Direct Financing Leases, Payment to be Received, Year Two Loans receivable Loans Receivable Loans Receivable [Member] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Product and Service [Domain] Product and Service [Domain] Investments in LIHTC: Lending exposure Lending Exposure Lending Exposure Short-term lease cost Short-Term Lease, Cost Derivative liabilities Derivative Liability Derivative Financial Instruments, Liabilities [Member] Vested / Exercised (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Changes in carrying amount of goodwill Goodwill [Roll Forward] Number of derivative contracts Number of Interest Rate Derivatives Held Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Net amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Dealer offsets to bifurcated embedded derivatives Dealer Offsets To Bifurcated Embedded Derivatives [Member] Represents the dealer offsets to bifurcated embedded derivatives. Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Transfers and Servicing [Abstract] Transfers and Servicing [Abstract] Security Exchange Name Security Exchange Name Unrealized holding gains (losses), Before-tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Manufactured housing Manufactured Housing Loan [Member] Manufactured Housing Loan Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Vested / Exercised (in dollars per shares) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Restricted Stock Units, Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Tax-exempt interest revenue Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Salaries and employee benefits Salaries and employee benefits expense Labor and Related Expense Transfers of AFS securities to HTM securities Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Transferred From Available-For-Sale, Fair Value Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Transferred From Available-For-Sale, Fair Value Summary of AFS debt securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Unrealized Loss, Less than 12 Months Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Short-term borrowings Short-Term Debt Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amount of future funding commitments Other Commitment Schedule of Amortized Cost Basis, Unrealized Gains and Losses, and Fair Value of Afs Debt Securities Debt Securities, Available-for-Sale [Table Text Block] Proceeds from Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Securities losses, net Realized Investment Gains (Losses) Nonrecurring Fair Value, Nonrecurring [Member] Changes in fair value due to decay, passage of time and other Servicing Asset at Fair Value, Other Changes in Fair Value Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total other comprehensive income (loss), Tax (Expense) Benefit Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Common stock, issued (in shares) Common Stock, Shares, Issued Other assets Other Assets [Member] Retirement Plan Name [Domain] Retirement Plan Name [Domain] Mortgage banking derivatives Mortgage Banking Derivatives [Member] Information of Mortgage banking derivatives. Concentration risk, percentage Concentration Risk, Percentage Add (deduct): Add Deduct [Abstract] Unrealized Loss, Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Current period gross charge-offs, two years prior Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Derivative financial instruments Derivative financial instruments Derivative Liability Cash Flow [Table] Cash Flow [Table] Disclosure of information about cash flow. Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amounts related to interest settlements on derivatives Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments Commitments to extend credit Commitments to Extend Credit [Member] Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Common stock, authorized (in shares) Common Stock, Shares Authorized Net cash received in divestitures and acquisitions Net cash received (paid) for acquisition Payments to Acquire Businesses, Net of Cash Acquired Transfers from Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Schedule of supplemental cash flow information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Entity Voluntary Filers Entity Voluntary Filers Estimated residual value of leased equipment Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Amortization of net actuarial losses Defined Benefit Plan, Amortization of Gain (Loss) Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Deferred income tax expense Deferred Income Tax Expense (Benefit) Premises and Equipment Property, Plant and Equipment Disclosure [Text Block] (Gains) losses on derivative instruments realized in net income, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Discount rate for disclosures (percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Extension Extension1 [Member] Extension1 Other financing inflows Proceeds From Other Financing Activities Proceeds From Other Financing Activities Thereafter Time Deposit Maturities, after Year Five Total other comprehensive (loss) income, Net of Tax Amount Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Recurring Fair Value, Recurring [Member] Entity Listings [Table] Entity Listings [Table] Financing receivable, modified, weighted average extension term granted Financing Receivable, Modified, Weighted Average Extension Term Granted Financing Receivable, Modified, Weighted Average Extension Term Granted Loan purchase accounting adjustments Deferred Tax Assets Loan Purchase Accounting Adjustment Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from loan purchase accounting adjustment. Granted/Assumed (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Stock Conversion Description [Axis] Stock Conversion Description [Axis] Earliest Redemption Date Debt Instrument Earliest Call Year This element represents debt instrument earliest call year. Fair Value, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Other liabilities Increase (Decrease) in Other Operating Liabilities Unrealized holding gains on derivatives, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Long-term debt Total long-term debt Long-Term Debt Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Net investment in leases Net investment in leases Net Investment in Lease, before Allowance for Credit Loss Beginning plan assets Plan assets - end of year Defined Benefit Plan, Plan Assets, Amount Debt securities available-for-sale: Debt Securities Available-For-Sale And Equity Securities [Abstract] Debt Securities Available-For-Sale And Equity Securities [Abstract] Employer match of employee contributions (percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Match Loans and leases held for investment Total loans Loans and leases held for investment Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Operating lease liability, balance sheet line item Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Net income recognized on AFS fair value hedges Gain (Loss) on Derivative Instruments, Net, Pretax Financing receivable, repayment through operation or sale of collateral, amortized cost Financing Receivable, Repayment Through Operation Or Sale Of Collateral, Amortized Cost Financing Receivable, Repayment Through Operation Or Sale Of Collateral, Amortized Cost Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Investment in other subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Net defined benefit pension plan activity, Tax (Expense) Benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Document Annual Report Document Annual Report Schedule of Afs Securities Sales Activity Schedule of Realized Gain (Loss) [Table Text Block] Dividend Restrictions Dividend Restrictions [Policy Text Block] Represents disclosure of accounting policy for dividend restrictions. Interest revenue - loans, including fees Loans [Member] Vested / Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Reclassification of securities from available-for-sale to held-to-maturity, Before-tax Amount Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Before Tax Other​ Comprehensive​ Income​ (Loss), ​Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Before Tax Long-term debt Long-term debt interest expense Interest Expense, Long-Term Debt Schedule of condensed balance sheets Condensed Balance Sheet [Table Text Block] Income producing CRE Income producing CRE Income Producing Commercial Real Estate [Member] Property that represents income producing commercial real estate. Amortization of intangibles Amortization of Intangible Assets Rate Reduction, Payment Delay & Extension Rate Reduction, Payment Delay, and Extension [Member] Rate Reduction, Payment Delay, and Extension Accounting Policies [Abstract] Accounting Policies [Abstract] Liabilities: Liabilities [Abstract] Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Less net discount Debt Instrument, Unamortized Discount Schedule of Contractual Maturities of Time Deposits, Including Brokered Time Deposits Time Deposit Maturities [Table Text Block] Loss Contingencies Commitments and Contingencies, Policy [Policy Text Block] Fair Value, 12 Months or More Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Accounting Policies [Line Items] Accounting Policies [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Fair Value of Financial Instruments Fair Value Measurement, Policy [Policy Text Block] Acquisitions and Divestitures Business Combination Disclosure [Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Less discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount AFS, Fair Value, Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value PEO Name PEO Name Total time deposits Time Deposits Hedge Accounting Basis Adjustment Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease) FHLB Stock Federal Home Loan Bank Stock Loan Commitments and Related Financial Instruments Loan Commitments, Policy [Policy Text Block] Award Type [Domain] Award Type [Domain] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Impact of equity-based compensation awards (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Nonqualified share based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Less: Cash collateral received/pledged Derivative Asset, Fair Value of Collateral Schedule of Carrying Amount of Goodwill and Other Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Net deferred tax asset Deferred Income Tax Assets, Net Non-PEO NEO Non-PEO NEO [Member] Trust preferred securities Trust Preferred Securities [Member] Represents information of trust preferred securities. Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Capital Surplus Additional Paid-in Capital [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Schedule of major classifications of loan and lease portfolio Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Benefit Plans Retirement Benefits [Text Block] Class of Stock [Line Items] Class of Stock [Line Items] Current period gross charge-offs, four years prior Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Recently Adopted Standards and Accounting Standards Updates Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Amortized Cost by Type of Modification Amortized cost Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Class of Stock [Axis] Class of Stock [Axis] Title and Position [Domain] Title and Position [Domain] HTM, Fair Value, 1 to 5 years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Schedule of changes in obligations and plan assets Schedule of Defined Benefit Plans Disclosures [Table Text Block] Name Measure Name HTM, Fair Value, 5 to 10 years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Entity Interactive Data Current Entity Interactive Data Current Vested / Exercised (in shares) Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Exercisable Number This element represents share based compensation arrangement by share based payment award equity instruments other than option exercisable number. Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Transfers from Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Sublease income and rental income from owned properties under operating leases Sublease Income And Rental Income From Owned Properties Under Operating Leases Sublease Income And Rental Income From Owned Properties Under Operating Leases Number of operating segments Number of Operating Segments DTAs: Components of Deferred Tax Assets [Abstract] Reliant Reliant Bancorp, Inc [Member] Reliant Bancorp, Inc Defined benefit pension plan activity: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent [Abstract] Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Derivative assets - mortgage Derivative Assets Mortgage [Member] Derivative Assets Mortgage Stock-based compensation Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Begin to expire in 2026 Net Operating Loss Carry Forwards Begin To Expire In 2026 [Member] Net Operating Loss Carry Forwards Begin To Expire In 2026 Schedule of Restricted Stock Units and Options Outstanding and Activity Share-Based Payment Arrangement, Activity [Table Text Block] Amortization of defined benefit pension plan net periodic pension cost components: Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Interest Rate (percent) Interest rate Debt Instrument, Interest Rate, Stated Percentage First Miami First Miami Bancorp, Inc [Member] First Miami Bancorp, Inc Vested / Exercised, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Total noninterest income Noninterest Income Income tax credits and other income tax benefits Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense Equity securities with readily determinable fair values Equity Securities, FV-NI Renewable energy investments: Renewable Energy Investments [Member] Renewable Energy Investments Net income available to common shareholders, diluted Net income available to common shareholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted ROU asset Deferred Tax Liabilities, Right Of Use Assets Deferred Tax Liabilities, Right Of Use Assets Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Nonaccrual Loans Financing Receivable, Excluding Accrued Interest, Nonaccrual Preferred stock dividend rate (percent) Preferred Stock, Dividend Rate, Percentage Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Acquired servicing rights Servicing Asset At Fair Value, Acquired Servicing Asset At Fair Value, Acquired Auditor Firm ID Auditor Firm ID Prepayment rate assumption Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Schedule of risk category of term loans by vintage year Financing Receivable Credit Quality Indicators [Table Text Block] Total deposits Deposits 2028 Sales-Type and Direct Financing Leases, Payment to be Received, Year Four Mortgage loans held for sale Fair value Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Total liabilities and shareholders’ equity Liabilities and Equity Foreclosed Properties (OREO) and Repossessed Assets Financing Receivable, Held-for-Investment, Foreclosed Asset [Policy Text Block] Subsequent Events Subsequent Events [Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] AFS, Fair Value, 5 to 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Hedging Designation [Axis] Hedging Designation [Axis] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] ACL - Loans Financing Receivable, Allowance For Credit Losses [Policy Text Block] Financing Receivable, Allowance For Credit Losses Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Payment Delay & Extension Payment Delay And Extension [Member] Payment Delay And Extension Unearned income Sales Type And Direct Financing Leases, Deferred Selling Profit Sales Type And Direct Financing Leases, Deferred Selling Profit Interest revenue - investment securities Securities Investment [Member] ROU assets resulting in net increase in operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Underlying Security Market Price Change Underlying Security Market Price Change, Percent Total capital, Well Capitalized Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Measurement Input Type [Axis] Measurement Input Type [Axis] Individual: Individual [Axis] 2027 senior debentures Two Thousand Twenty Seven Senior Debentures [Member] Represents information of 2027 senior debentures. Buildings and improvements Buildings and improvements Building and Building Improvements [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Cancelled (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Dealer offsets to customer derivative positions Dealer Offset To Customer Swap Position [Member] Represents the dealer offset to customer swap position. Dividends [Domain] Dividends [Domain] Deferred gains on SBA/USDA loan sales Deferred Tax Assets, Deferred Gain On SBA USDA Loan Sales Deferred Tax Assets, Deferred Gain On SBA USDA Loan Sales Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] Measurement Input Type [Domain] Measurement Input Type [Domain] Net unrealized gains (losses), Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Other non-cash consideration Other Non-Cash Consideration Other Non-Cash Consideration Series I perpetual non-cumulative preferred stock UCBI Series I Non-Cumulative Preferred Stock [Member] UCBI Series I Non-Cumulative Preferred Stock Net amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Manufactured housing loans Manufactured Housing Loans [Member] Manufactured Housing Loans Noninterest expenses: Operating Expenses [Abstract] Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Unrealized losses on held-to-maturity securities transferred from available-for-sale: Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity [Abstract] Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Transfers To Held To Maturity Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Schedule of Premises and Equipment Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Dividend date declared Dividends Payable, Date Declared Total fair value of consideration transferred Business Combination, Consideration Transferred Balance at beginning of period Balance at ending of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] ACL - Held-to-Maturity Securities, Available-For-Sale Securities, and Off-Balance Sheet Credit Exposures Credit Loss, Financial Instrument [Policy Text Block] Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Loans held for sale Loan, Held-for-Sale, Fair Value Disclosure Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Communications and equipment Communications and Information Technology Minimum Low Minimum [Member] CET1 capital Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual Payment Delay Payment Delay [Member] Payment Delay Adoption Date Trading Arrangement Adoption Date Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Tier 1 capital, Well Capitalized Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Community First Capital Trust I Community First Capital Trust One [Member] Community First Capital Trust One Other operating expenses Other Operating Income (Expense) [Member] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Supplemental consolidated pro forma revenue Business Acquisition, Pro Forma Revenue Derivative Instrument [Axis] Derivative Instrument [Axis] Long-term debt, gross Long-Term Debt, Gross Home equity Home equity Home Equity Line of Credit [Member] Exercise Price Award Exercise Price Schedule of summarizes the sources and expected tax consequences of future taxable deductions (revenue) Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Arrangement Duration Trading Arrangement Duration Tier 1 capital Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual Investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Net operating loss carryforwards Operating Loss Carryforwards Common stock issuable under the deferred compensation plan (in shares) Common Stock Issuable Shares Under Deferred Compensation Plan This element represents common stock issuable shares under deferred compensation plan. Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Defaults within 12 months of modification Financing Receivable, Modified, Subsequent Default Shareholders' equity: Equity, Attributable to Parent [Abstract] United Community Bank Subsidiaries [Member] Fair Value, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Interest expense- deposits Deposits [Member] Tier 1 capital, Minimum Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Federal Domestic Tax Jurisdiction [Member] Noninterest income: Noninterest Income [Abstract] Common stock issuable; 600,168 and 620,108 shares, respectively Common Stocks Issuable Represents amount of carrying amount of common stock issuable. Extended Maturity Extension Extended Maturity [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Less: Amounts subject to master netting agreements Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Four With an allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Allowance Amount of financing receivable on nonaccrual status with an allowance for credit loss. All Individuals All Individuals [Member] Derivative Asset Derivative Asset [Member] Represents Derivative Asset. Rate Reduction & Extension Extended Maturity and Interest Rate Reduction [Member] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Gross Unrealized Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Credit concentration risk Credit Concentration Risk [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Loans and leases, net Loans and leases, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Preferred stock dividend per preferred share (in dollars per share) Preferred Stock, Dividends Per Share, Declared Receivables [Abstract] Receivables [Abstract] 2029 Sales-Type and Direct Financing Leases, Payment to be Received, Year Five Schedule of Key Characteristics, Inputs, and Economic Assumptions Used To Estimate The Fair Value of Residential Mortgage Loans Servicing Asset and Sensitivity Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Realized losses included in net income, Tax (Expense) Benefit Income tax benefit attributable to sales Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Preferred stock dividends Dividends, Preferred Stock, Cash Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Decrease in other assets Increase (Decrease) in Other Noncurrent Assets Federal Reserve Stock Federal Reserve Bank Stock Change in plan assets, at fair value: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Total Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing Weighted average payment delay term (in months) Financing Receivable, Modified, Weighted Average Payment Delay Term Increase from Modification Financing Receivable, Modified, Weighted Average Payment Delay Term Increase from Modification Assets: Assets, Fair Value Disclosure [Abstract] Schedule of actual results and pro forma information Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] With no allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Liability Class [Axis] Liability Class [Axis] Taxable Interest Income, Securities, Operating, Taxable Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Interest expense Interest Expense [Member] Shares repurchased (in shares) Stock Repurchased During Period, Shares Number of AFS debt securities in unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Decrease (increase) in other assets Other assets Increase (Decrease) in Other Operating Assets Term of contingent consideration Term Of Contingent Consideration Term Of Contingent Consideration Unrealized gains (losses) on available-for-sale securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Core deposit intangible Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles CET1 capital Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Risk-based ratios: Banking Regulation, Risk-Based Information [Abstract] Accounting Policies [Table] Accounting Policies [Table] Represents information of accounting policies of the organization. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Accumulated benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Non-PCD loans: Business Combination, Acquired Receivables [Abstract] Measure: Measure [Axis] Derivatives designated as hedging instruments Derivative Instruments in Hedges, Liabilities, at Fair Value Net cash flow hedge activity, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Impact of equity-based compensation awards Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Asset Class [Domain] Asset Class [Domain] Outstanding, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Accrued interest receivable Interest Receivable and Other Assets [Abstract] 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year One Entity Emerging Growth Company Entity Emerging Growth Company Non-credit discount Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) ROU asset, balance sheet line item Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Total liabilities Liabilities, Fair Value Disclosure Modified Retirement Plan Modified Retirement Plan [Member] Represents information about Modified Retirement Plan. Purchase price Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price Time deposits (excluding brokered time deposits) that met or exceeded FDIC insurance limit Time Deposits, at or Above FDIC Insurance Limit Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Merger-related costs Acquisition-related Costs [Member] Equity Component [Domain] Equity Component [Domain] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Payment Delay Payment Delay1 [Member] Payment Delay1 Net interest revenue after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Loans held for investment Loans Held For Investment, After Nonrecurring Fair Value Adjustment, Carrying Value Loans Held For Investment, After Nonrecurring Fair Value Adjustment, Carrying Value Total interest revenue Investment securities interest revenue Interest and Dividend Income, Operating Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Preferred stock, $1 par value: 10,000,000 shares authorized; 3,662 Series I issued and outstanding; $25,000 per share liquidation preference Preferred stock carrying amount Preferred Stock, Including Additional Paid in Capital, Net of Discount Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Loans Past Due, 30 - 59 Days Loans Past Due, 30 - 59 Days Financial Asset, 30 to 59 Days Past Due [Member] Statement [Table] Statement [Table] Overdrawn deposit accounts Deposit Liabilities Reclassified as Loans Receivable Measurement Frequency [Domain] Measurement Frequency [Domain] Contractual maturities of time deposits Time Deposits, Fiscal Year Maturity [Abstract] Current period gross charge-offs, in current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Schedule of gains and losses recognized in income on derivatives not designated as hedging instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Number of banking branches Number Of Branches Represents number of branches operated by entity. Losses (gains) from other loan sales, net Gain (Loss) on Sale of Loans and Leases Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Level 1 Fair Value, Inputs, Level 1 [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Originated in prior year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Unrealized Loss, Total Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss Statement of Cash Flows [Abstract] Statement of Cash Flows Statement of Cash Flows [Abstract] Senior debentures Senior Notes [Member] HTM, Fair Value, More than 10 years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value O 2025 Q1 Dividends O 2025 Q1 Dividends [Member] O 2025 Q1 Dividends Vested / Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number % of Total Class of Receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Actual revenue included since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Tier 1 capital Banking Regulation, Tier 1 Risk-Based Capital, Actual Employer contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Realized losses included in net income, Before-tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 2025 Time Deposit Maturities, Year One Gains to be reclassified from accumulated other comprehensive income into earnings over the next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Repayment of Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities HTM, Amortized Cost, Not due at single maturity Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, without Single Maturity Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Loans and leases held for investment Loans And Leases Held For Investment [Member] Loans And Leases Held For Investment Income Taxes Income Tax Disclosure [Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit, Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit, Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Investment Program, Proportional Amortization Method, Applied, Income Tax Credit And Other Tax Benefit, Amortization, Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag Loans serviced for others not included in balance sheet Continuing Involvement with Derecognized Transferred Financial Assets, Amount Outstanding Contingent consideration receivable Contingent consideration receivable Contingent Consideration Receivable Contingent Consideration Receivable Weighted average discount rate (percent) Operating Lease, Weighted Average Discount Rate, Percent Net increase (decrease) in short-term borrowings Proceeds from (Repayments of) Short-Term Debt Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Long-term debt Long-Term Debt, Fair Value Pledging Purpose [Domain] Pledging Purpose [Domain] Entity Registrant Name Entity Registrant Name Commercial MBS Commercial MBS Commercial Mortgage-Backed Securities [Member] Cash Payments to Acquire Businesses, Gross Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Fair Value as of Grant Date Award Grant Date Fair Value Net increase (decrease) in deposits Increase (Decrease) in Deposits Level 2 Fair Value, Inputs, Level 2 [Member] Amortization of unrealized losses, , Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), after Tax Risk participations Risk Participations [Member] Represents information about risk participations. AFS, Amortized Cost, More than 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Organization and Basis of Presentation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] Common stock, $1 par value; 200,000,000 shares authorized, 119,364,110 and 119,010,319 shares issued and outstanding, respectively Common Stock, Value, Issued Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Derivatives Deferred Tax Liabilities, Derivatives Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] AFS, Amortized Cost, 1 to 5 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Common stock issued for acquisitions Value of common stock issued Stock Issued During Period, Value, Acquisitions Tier 1 leverage ratio Banking Regulation, Tier 1 Leverage Capital Ratio, Actual Interest-bearing deposits in banks Interest-Bearing Deposits in Banks and Other Financial Institutions Common stock issued for acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Proceeds from issuance of common stock for dividend reinvestment plan Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan Other Deferred Tax Assets, Other Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Land and land improvements Land and Land Improvements [Member] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Financing activities: Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Five State taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Commercial MBS, Non-agency Commercial Mortgage-Backed Securities, Issued By Private Enterprises [Member] Debt securities collateralized by commercial real estate mortgage loans (mortgages), issued by non-governmental sponsored enterprises. Total DTLs Deferred Tax Liabilities, Gross Contingent consideration receivable, measurement input Contingent Consideration Receivable, Measurement Input Contingent Consideration Receivable, Measurement Input Basic (in dollars per share) Earnings Per Share, Basic Net cash payments related to the lease liability Operating Lease, Payments Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Plan exercisable period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Investment in partnerships Deferred Tax Assets, Investments Nonaccrual Financial Asset, Nonaccrual [Member] Financial Asset, Nonaccrual 2028 Time Deposit Maturities, Year Four Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Goodwill [Table] Goodwill [Table] Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Acquired intangible assets Deferred Tax Liabilities, Intangible Assets Schedule of Accrued Interest Receivable Schedule Of Debt Securities Accrued Interest Receivable [Table Text Block] Schedule Of Debt Securities Accrued Interest Receivable Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Amortization of defined benefit pension plan net periodic pension cost components, Net of Tax Amount Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Include Net Periodic Pension Cost For Defined Benefit Pension Plan Net Of Tax Other comprehensive income amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, net of tax. Common Stock Issuable Common Stock Issuable [Member] Common stock issuable. 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Granted/Assumed (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Net actuarial (loss) gain on defined benefit pension plans, Net of Tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Debt securities, held-to-maturity, fair value Fair Value Fair Value HTM debt securities Debt Securities, Held-to-Maturity, Fair Value Acquisition Activities Business Combinations Policy [Policy Text Block] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Unrealized losses on AFS securities Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss AFS, Amortized Cost, 5 to 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Discount rate for net periodic benefit cost (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Total revenue Revenues Cash paid during the period for: Payments for Operating Activities [Abstract] Equity Compensation Plans Share-Based Payment Arrangement [Text Block] Cash dividends on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Outside services - electronic banking Noninterest Expense, Outside Services Electronic Banking Noninterest Expense, Outside Services Electronic Banking Entity Address, City or Town Entity Address, City or Town Operating Leases Lessee, Leases [Policy Text Block] 2025 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Qualitative adjustment Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease), Qualitative Adjustment Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease), Qualitative Adjustment Vested / Exercised during period, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Less allowance for credit losses - loans and leases Less ACL - loans ACL - loans, Beginning Balance ACL - loans, Ending Balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Dividends [Axis] Dividends [Axis] Compensation expense Share-Based Payment Arrangement, Expense Fair Value Recorded by United Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Penalties and interest related to income taxes Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Pull through rate Measurement Input, Pull Through Rate [Member] Measurement Input, Pull Through Rate [Member] 20% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Other Commitments [Table] Other Commitments [Table] Granted/Assumed (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Business Acquisition [Axis] Business Acquisition [Axis] Net decrease (increase) in loans Payments for (Proceeds from) Loans and Leases Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Current Loans Financial Asset, Not Past Due [Member] Noninterest-bearing demand Noninterest-Bearing Deposit Liabilities True tax leases Deferred Tax Liabilities, Leasing Arrangements Liabilities: Liabilities, Fair Value Disclosure [Abstract] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] HTM, Amortized Cost, 5 to 10 years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Commercial Commercial Portfolio Segment [Member] Document Fiscal Year Focus Document Fiscal Year Focus Schedule of nonaccrual loans by loan class Financing Receivable, Nonaccrual [Table Text Block] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Servicing Rights Roll Forward Servicing Asset at Fair Value, Amount [Roll Forward] Fair value hedge of loans Derivatives, Loans [Member] Derivatives, Loans Total assets Assets, Fair Value Disclosure Regulatory Capital Requirements Under Banking Regulations [Abstract] Regulatory Capital Requirements Under Banking Regulations 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Period End Date Document Period End Date Amortization of defined benefit pension plan net periodic pension cost components, Tax (Expense) Benefit Other Comprehensive Income Loss Amortization Of Prior Service Cost And Actuarial Losses Included In Net Periodic Pension Cost For Defined Benefit Pension Plan Tax Expense Benefit1 Represents amount of other comprehensive income (loss) amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, tax expense benefit. Tier 1 leverage ratio, Minimum Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum Total Lessee, Operating Lease, Liability, to be Paid Units outstanding (in shares) Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Asset Class [Axis] Asset Class [Axis] Number of extensions Financing Receivable, Modified, Number Of Extensions Financing Receivable, Modified, Number Of Extensions Insider Trading Arrangements [Line Items] Schedule Of Servicing Asset [Table] Schedule Of Servicing Asset [Table] Represents the tabular information of servicing asset. 2027 Time Deposit Maturities, Year Three Special Mention Special Mention [Member] Other investing outflows Payments For Other Investing Activities Payments For Other Investing Activities 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three Loan origination costs Deferred Tax Liabilities, Deferred Expense, Debt Issuance Costs RWAs Banking Regulation, Risk-Weighted Assets, Actual Risk Category [Axis] Risk Category [Axis] Risk Category Revision of Previously Issued Financial Statements Reclassification, Comparability Adjustment [Policy Text Block] Securities purchase accounting adjustments Deferred Tax Liabilities, Securities Purchase Accounting Adjustments Deferred Tax Liabilities, Securities Purchase Accounting Adjustments Document Transition Report Document Transition Report 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Servicing Asset at Fair Value, Activity [Table] Servicing Asset at Fair Value, Activity [Table] Fair value Business Combination, Acquired Receivable, Fair Value Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Schedule of reconciliation of the beginning and ending unrecognized tax benefit related to uncertain tax positions Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] BOLI Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Bank Owned Life Insurance Represents amount of Bank owned life insurance recognized as of the acquisition date. 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