Originated three years prior Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Nonaccrual loans with no allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Restricted Stock Units Restricted Stock Units [Abstract] Restricted Stock Units Revolvers Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Proceeds from sales Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale ACL Financing Receivable, Allowance for Credit Loss [Roll Forward] % of Total Class of Receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Total loans sold Financing Receivable, Sale and Reclassification to Held-for-Sale Pledging Purpose [Domain] Pledging Purpose [Domain] Vested / Exercisable (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. Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Plan exercisable period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Award Type [Domain] Award Type [Domain] Mortgage banking - loan commitment Mortgage Banking Loan Commitment [Member] Represents information of mortgage banking - loan commitment. Noninterest-bearing demand Noninterest-Bearing Deposit Liabilities Investment, Name [Domain] Investment, Name [Domain] Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] HTM, Fair Value, More than 10 years Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Cash Payments to Acquire Businesses, Gross Schedule of Purchased Assets and Assumed Liabilities Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Current period gross charge-offs, in current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Decrease in the weighted average interest rate Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Federal Home Loan Bank advances FHLB advances Advance from Federal Home Loan Bank Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value AFS, Fair Value, More than 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Vested / Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Preferred Stock Equity [Text Block] Current Loans Financial Asset, Not Past Due [Member] 2027 Sales-Type and Direct Financing Leases, Payment to be Received, Year Four Directors Director [Member] Accumulated impairment losses on goodwill Goodwill, Impaired, Accumulated Impairment Loss Subsequent Event Type [Domain] Subsequent Event Type [Domain] Cash dividends on common stock Payments of Ordinary Dividends, Common Stock Derivative Instruments [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Diluted (in dollars per share) Earnings Per Share, Diluted Allowance for credit losses, HTM portfolio Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 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 Receivable [Domain] Receivable [Domain] Communications and equipment Communications and Information Technology Trading Symbol Trading Symbol Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Debt Securities AFS Debt Securities AFS Debt Securities [Member] Net unrealized losses, Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax 30-90 Days Maturity 30 to 90 Days [Member] HTM, Fair Value, Within 1 year Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Reclassification of unrealized losses, Tax (Expense) Benefit Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Tax Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Shareholders' equity: Equity, Attributable to Parent [Abstract] 2026 Sales-Type and Direct Financing Leases, Payment to be Received, Year Three Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Schedule of Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Gains from sales of other loans, net Gain (Loss) on Sales of Loans, Net Schedule of Reconciliation 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] FDIC assessments and other regulatory charges Federal Deposit Insurance Corporation Premium Expense 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 Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Released / Exercised (in dollars per shares) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Level 1 Fair Value, Inputs, Level 1 [Member] Interest expense: Interest Expense [Abstract] Investment securities, including tax exempt of $1,722, $2,568, $5,563 and $7,762, respectively Interest and Dividend Income, Securities, Operating CET1 capital Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual Carrying Amount Reported Value Measurement [Member] Revolvers converted to term loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Equity Components [Axis] Equity Components [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Hedging Relationship [Domain] Hedging Relationship [Domain] Additional awards remaining available under plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Less allowance for credit losses - loans and leases Less allowance for credit losses - loans ACL - loans, Beginning Balance ACL - loans, Ending Balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Greater than 90 days Maturity Greater than 90 Days [Member] Entity Small Business Entity Small Business 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Four Local Phone Number Local Phone Number Mortgage banking - forward sales commitment Mortgage Banking Forward Sales Commitment [Member] Represents mortgage banking - forward sales commitment. Letters of credit Letter of Credit [Member] Notional Amount Aggregate notional amount Derivative, Notional Amount Schedule of Minimum Amounts Required for Capital Adequacy Purposes Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Measurement Frequency [Axis] Measurement Frequency [Axis] Extension Extended Maturity [Member] Restricted Stock Unit Awards Restricted stock units Restricted Stock Units (RSUs) [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] 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] Amortization of unrealized losses, Tax (Expense) Benefit Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), Available For Sale To Held To Maturity, Tax Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), Available For Sale To Held To Maturity, Tax Goodwill and other intangible assets, net Total goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Financial instruments whose contract amounts represent credit risk: Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Unrealized Loss, Less than 12 Months Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total revenue Revenues Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Residential MBS, Agency & GSEs 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 Short-Term Debt [Line Items] Short-Term Debt [Line Items] Merger-related and other charges Merger-related and other charges Business Combination, Acquisition Related Costs Potentially dilutive instruments outstanding not included in EPS analysis (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Award Type [Axis] Award Type [Axis] Special Mention Special Mention [Member] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 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 Originated five or more years prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Document Quarterly Report Document Quarterly Report Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Hedging Designation [Axis] Hedging Designation [Axis] ACL - unfunded commitments, Provision Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Repayment of FHLB advances Payments of FHLBank Borrowings, Financing Activities Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] 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. Total intangible assets subject to amortization Finite-Lived Intangible Assets, Net Updates to Significant Accounting Policies, Recently Adopted Standards and Recently Issued Standards New Accounting Pronouncements, Policy [Policy Text Block] Salaries and employee benefits expense Salaries And Employee Benefit Expense [Member] Salaries And Employee Benefit Expense Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization 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 U.S. Government agencies & GSEs US Government-sponsored Enterprises Debt Securities [Member] Nonaccrual loans Nonaccrual Status [Abstract] Estimate of contractual cash flows not expected to be collected Business Combination, Acquired Receivables, Estimated Uncollectible Other financing outflows Payments For Other Financing Activities Payments For Other Financing Activities Total fair value of consideration transferred Business Combination, Consideration Transferred Business combinations Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Business Combination And Provisional Adjustment Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Business Combination And Provisional Adjustment 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 Security Exchange Name Security Exchange Name Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Stock options Employee Stock Option [Member] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Total capital, Well-Capitalized Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Less: Amounts subject to master netting agreements Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Net amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Maximum Maximum [Member] Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Depreciation, amortization and accretion, net Depreciation, Amortization and Accretion, Net Document Type Document Type Acquisitions Goodwill, Acquired During Period Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Investment securities, tax exempt Interest Income, Securities, Operating, Tax Exempt 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 Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Less: Cash collateral received/pledged Derivative Liability, Fair Value of Collateral Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Purchases Payments to Acquire Debt Securities, Available-for-Sale Cash dividends on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Recognized on derivative interest settlements Gain (Loss) On Derivative Interest Settlement Gain (Loss) On Derivative Interest Settlement Business Acquisition [Axis] Business Acquisition [Axis] Schedule of Modifications to Borrowers Experiencing Financial Difficulty Financing Receivable, Modified [Table Text Block] Derivative [Table] Derivative [Table] Federal Home Loan Bank advances Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Advances Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Advances Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Residential mortgage servicing rights Residential Mortgage Servicing Rights [Member] Residential Mortgage Servicing Rights [Member] Bifurcated embedded derivatives and dealer offsets Bifurcated Embedded Derivatives And Dealer Offsets [Member] Bifurcated embedded derivatives and dealer offsets. Cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Title of 12(b) Security Title of 12(b) Security Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Acquisitions Business Combination Disclosure [Text Block] Tier 1 capital, Well-Capitalized Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Commercial Commercial Portfolio Segment [Member] Cash flow hedge of trust preferred securities Trust Preferred Securities Hedge [Member] Trust Preferred Securities Hedge Mortgage loans held for sale Fair value Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (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 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. Schedule of Major Classifications of Loan Portfolio Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Unrealized holding losses, Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Preferred stock dividends Dividends, Preferred Stock Remainder of 2023 Sales-Type and Direct Financing Leases, Payment to be Received, Remainder of Fiscal Year Fair value hedge Fair Value Hedge Liabilities Statistical Measurement [Axis] Statistical Measurement [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Interactive Data Current Entity Interactive Data Current Schedule of AFS Securities Sales Activity Schedule of Realized Gain (Loss) [Table Text Block] Residential Residential Portfolio Segment [Member] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] 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] 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 AFS, Fair Value, Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Other assets Other Assets [Member] Discount on preferred shares repurchased Discount On Preferred Shares Repurchased Discount On Preferred Shares Repurchased Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Comprehensive income (loss), Tax (Expense) Benefit Comprehensive Income Loss Tax Represents amount of comprehensive income loss tax. Lending and loan servicing expense Loan Portfolio Expense Wealth management fees Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Summary of HTM debt securities in an unrealized loss position Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract] Supranational entities Other Debt Obligations [Member] Less: Amounts subject to master netting agreements Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Current period gross charge-offs, two years prior Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Listings [Line Items] Entity Listings [Line Items] Total noninterest income Noninterest Income 2024 Finite-Lived Intangible Asset, Expected Amortization, Year One Depositary Shares, 1/1000th Of Preferred Share Depositary Shares, 1/1000th Of Preferred Share [Member] Depositary Shares, 1/1000th Of Preferred Share Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Net unrealized losses, Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Common stock outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Transfers from Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Net income recognized Gain (Loss) on Derivative Instruments, Net, Pretax HTM debt securities: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Conversion of Stock, Name [Domain] Conversion of Stock, Name [Domain] Progress Progress Bank & Trust [Member] Progress Bank & Trust Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Mortgage Loans Held for Sale Mortgage Loans Held For Sale [Abstract] Mortgage Loans Held For Sale Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Equity securities with readily determinable fair values Equity Securities, FV-NI, Current 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 Gains (Losses) on derivative instruments realized in net income, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Interest rate swaps Interest Rate Swap [Member] Professional fees Professional Fees Number of AFS debt securities in unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Actual revenue included since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Leverage ratio, Well-Capitalized Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum Measurement Input Type [Domain] Measurement Input Type [Domain] Schedule of Actual Results and Pro Forma Information Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Net cash flow hedge activity, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Equity investments, inflows Proceeds From Other Investments Proceeds From Other Investments Total liabilities Liabilities Fair Value, Total Debt Securities, Available-for-Sale, Unrealized Loss Position Measurement Frequency [Domain] Measurement Frequency [Domain] Security deposits Sales Type And Direct Financing Leases, Security Deposits Sales Type And Direct Financing Leases, Security Deposits Title of Individual [Axis] Title of Individual [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] 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 Impact of other United sponsored 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 Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Fair Value, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total other comprehensive loss, Tax (Expense) Benefit Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Loans, including fees Interest and Fee Income, Loans and Leases Consumer Consumer Portfolio Segment [Member] Equipment financing Equipment financing receivables Equipment Financing [Member] Represents information related to equipment financing. Service charges and fees Deposit Account [Member] Preferred Stock Preferred Stock [Member] ACL - loans, Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Rate Reduction & Extension Extended Maturity and Interest Rate Reduction [Member] Schedule of Amortized Cost of Loans by Risk Category by Vintage Year Financing Receivable Credit Quality Indicators [Table Text Block] Current period gross charge-offs, Total ACL - loans, Charge-Offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Accounting Standards Updates and Recently Adopted Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Purchases of preferred stock (in shares) Shares repurchased (in shares) Stock Repurchased During Period, Shares Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 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 Cash flow hedge Interest Rate Cash Flow Hedge Asset at Fair Value Granted (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 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Asset-backed securities Asset-Backed Securities [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Vested / Exercisable, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Class of Stock [Axis] Class of Stock [Axis] 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 Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Hedge Accounting Basis Adjustment Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Debt securities held-to-maturity: Debt Securities Held To Maturity [Abstract] Debt Securities Held To Maturity [Abstract] AFS, Amortized Cost, Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] Options converted Business Combination, Consideration Transferred, Converted Stock Options Business Combination, Consideration Transferred, Converted Stock Options Business Combination and Asset Acquisition [Abstract] Gross realized gains Debt Securities, Available-for-Sale, Realized Gain Supplemental consolidated pro forma revenue Business Acquisition, Pro Forma Revenue Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Residential Mortgage and Manufactured Housing Residential Mortgage And Manufactured Housing [Member] Residential Mortgage And Manufactured Housing Advertising and public relations Marketing and Advertising Expense Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Reclassifications related to derivative instruments accounted for as cash flow hedges: Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Servicing rights for SBA/USDA loans Servicing Asset at Fair Value, Amount Preferred stock issued (in shares) Preferred Stock, Shares Issued Customer derivatives and dealer offsets Customer Derivatives And Dealer Offsets [Member] Information of Customer Derivatives And Dealer Offsets. Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Investments in LIHTC: Amount of future funding commitments included in carrying amount Qualified Affordable Housing Project Investments, Commitment Entity Emerging Growth Company Entity Emerging Growth Company Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] 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 Core deposit intangible Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Net interest revenue after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Schedule of Fair Value Hedging Instruments, Carrying Value and Basis Adjustments 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 Restricted stock units and performance stock units Restricted Stock Units RSU And Performance Stock Units [Member] Restricted Stock Units RSU And Performance Stock Units Common stock, par value $1 per share Common Stock Common Stock [Member] Par value Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Income Statement Location [Domain] Income Statement Location [Domain] 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 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 Schedule of Reconciliation 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] Amortization of unrealized losses on held-to-maturity securities transferred from available-for-sale, Tax (Expense) Benefit OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), Tax OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), Tax 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 Total Sales-Type and Direct Financing Leases, Payment to be Received Minimum Minimum [Member] Weighted average common shares outstanding: Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Other Noninterest Income, Other Operating Income Premises and equipment, net Property, Plant and Equipment, Net 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 Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] ASSETS Assets [Abstract] Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Schedule of Components of Net Investment in Leases Schedule Of Components Of Net Investment In Lease, Sales Type And Direct Financing Leases [Table Text Block] Schedule Of Components Of Net Investment In Lease, Sales Type And Direct Financing Leases [Table Text Block] Liabilities: Liabilities [Abstract] U.S. Treasuries US Treasury Securities [Member] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Retained Earnings Retained Earnings [Member] Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount 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 Net cash flow hedge activity, Net of tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Basic (in dollars per share) Earnings Per Share, Basic Released / Exercised during period, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Provision for credit losses Total ACL, Provision Provision for Loan, Lease, and Other Losses Schedule of AFS Debt Securities in an Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Total capital Banking Regulation, Total Risk-Based Capital Ratio, Actual 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 Loans in bankruptcy status Financing Receivable, Excluding Accrued Interest, Loans In Bankruptcy Status Financing Receivable, Excluding Accrued Interest, Loans In Bankruptcy Status Non-PCD loans: Business Combination, Acquired Receivables [Abstract] Lending and loan servicing fees Other Lending And Loan Servicing Fees Other Lending And Loan Servicing Fees Document Transition Report Document Transition Report Debt securities held-to-maturity (fair value $1,992,364 and $2,191,073, respectively) Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Interest Expense Interest Expense [Member] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Gains (Losses) on derivative instruments realized in net income, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Originated four years prior Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year 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] Unrealized Loss, Total Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss Proceeds from FHLB advances Proceeds from FHLBank Borrowings, Financing Activities Residential mortgage Residential Mortgage [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Net cash flow hedge activity, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Liability Class [Axis] Liability Class [Axis] Substandard Substandard [Member] Schedule of Contractual Amount of Off-balance Sheet Instruments Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] Commercial & industrial Commercial And Industrial Classification [Member] Commercial And Industrial Classification[Member] Short-term Borrowings Short-Term Debt [Text Block] Derivative financial instruments Derivative Asset 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 Deferred income tax expense Deferred Income Tax Expense (Benefit) Subsequent Event Type [Axis] Subsequent Event Type [Axis] 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 Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [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. Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Classifications of loans Financing Receivable, after Allowance for Credit Loss [Abstract] Schedule of Effect of Derivatives in Hedging Relationships on the Consolidated Statement of Income Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Cancelled (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Aggregate Intrinsic Value, Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Deposits: Deposits [Abstract] Schedule of Carrying Amount of Goodwill and Other Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Other assets Other Assets Restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements 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 Impact of acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Document Period End Date Document Period End Date Schedule of Nonaccrual Loans by Loan Class Financing Receivable, Nonaccrual [Table Text Block] Accrued interest receivable Interest Receivable and Other Assets [Abstract] Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Guaranteed portion of SBA/USDA loans SBA USDA Guaranteed Loans [Member] SBA USDA Guaranteed Loans [Member] Basis of Presentation and Updates to Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Income tax expense Net income, Tax (Expense) Benefit Income tax (expense) benefit Income Tax Expense (Benefit) Deferred compensation plan liability Deferred Compensation Liability, Current and Noncurrent Designated as hedging instrument Designated as Hedging Instrument [Member] Assets and Liabilities Measured at Fair Value Fair Value Disclosures [Text Block] Unrealized Loss, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Equity [Abstract] Equity [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Reclassification adjustment for losses included in net income, Net of Tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Loans Past Due, 60 - 89 Days Financial Asset, 60 to 89 Days Past Due [Member] Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Deposits Interest Expense, Deposits Reclassification of unrealized losses, Before-tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Before Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, Before Tax HTM Debt Securities, Held-To-Maturity [Member] Debt Securities, Held-To-Maturity Unrealized Loss, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Net cash received in acquisition Payments to Acquire Businesses, Net of Cash Acquired Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Schedule of Loans by Aging Category, Accrual Status and Days Past Due Category Financing Receivable, Past Due [Table Text Block] Schedule of Amortized Cost Basis, Unrealized Gains and Losses and Fair value of HTM Debt Securities Debt Securities, Held-to-Maturity [Table Text Block] 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 Schedule of Repurchase Agreements Schedule of Repurchase Agreements [Table Text Block] Nonaccrual Loans Nonaccrual loans Financing Receivable, Excluding Accrued Interest, Nonaccrual Deposits Deposits, Fair Value Disclosure Owner occupied commercial real estate Owner occupied commercial real estate Owner Occupied Commercial Real Estate [Member] Represents information of owner occupied commercial real estate. Amount of future funding commitments Other Commitment Total interest revenue Investment securities interest revenue Interest and Dividend Income, Operating Originated two years prior Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Other investing inflows Proceeds From Other Investing Activities Proceeds From Other Investing Activities Common stock issuable (in shares) Common Stock, Issuable, Shares Represents number of shares of common stock issuable. Interest Revenue Interest Income [Member] Capital Surplus Additional Paid-in Capital [Member] Unrealized holding gains on derivatives, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Loans Past Due, 30 - 59 Days Financial Asset, 30 to 59 Days Past Due [Member] Impact of other United sponsored 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 Balance Sheet Location [Axis] Balance Sheet Location [Axis] Other liabilities Other Liabilities [Member] Cover [Abstract] Cover [Abstract] Subsequent Events Subsequent Events [Text Block] Loans and Leases and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Recurring Fair Value, Recurring [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Supplemental Schedule of Noncash Investing and Financing Activities Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Current period gross charge-offs, four years prior Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Credit Loss Status [Axis] Credit Loss Status [Axis] Merger-related costs Acquisition-related Costs [Member] Cash flow hedging Cash Flow Hedging [Member] Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Equity Component [Domain] Equity Component [Domain] Service charges and other related fees Noninterest Income, Other AFS, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Entity Current Reporting Status Entity Current Reporting Status Preferred stock, $1 par value: 10,000,000 shares authorized; 3,745 and 4,000 shares Series I issued and outstanding, respectively; $25,000 per share liquidation preference Preferred Stock, Including Additional Paid in Capital, Net of Discount Securities losses, net Realized Investment Gains (Losses) Goodwill and other intangible assets Intangible Assets, Net (Including Goodwill) [Abstract] Up to 30 Days Maturity Less than 30 Days [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] ACL - loans, Provision Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Fair Value Estimate of Fair Value Measurement [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Customer relationship intangible Customer Relationships [Member] Fintech funds and certain other equity method investments: Fintech Funds [Member] Fintech Funds 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 Held for Investment Sold Schedule Of Financing Receivables Sold, Loans [Table Text Block] Schedule Of Financing Receivables Sold, Loans Revolvers Financing Receivable, Excluding Accrued Interest, Revolving Consolidated Entities [Axis] Consolidated Entities [Axis] Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Total loans Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing 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 Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Stock Options Stock Options [Abstract] Stock Options Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] 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 Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Fair Value, Total Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value 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. Credit Loss Status [Domain] Credit Loss Status [Domain] Vested / Exercisable, Weighted Average Remaining Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Transfers from Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 AFS, Fair Value, Not due at single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Actual net income (loss) included since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Investment, Name [Axis] Investment, Name [Axis] Schedule of Gains and Losses Recognized in Income on Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Carrying amount Securities Sold under Agreements to Repurchase Corporate bonds Corporate Bonds Corporate Debt Securities [Member] Depositary shares, each representing 1/1000th interest in a share of Series I 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 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. Number of derivative contracts Number of Interest Rate Derivatives Held Premises and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Bifurcated embedded derivatives Bifurcated Embedded Derivative [Member] Represents the bifurcated embedded derivatives. Fair value hedges: Effect of Fair Value Hedges on Results of Operations [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Business Acquisition [Line Items] Business Acquisition [Line Items] 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] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Loans and leases, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Total gross derivative instruments Derivative Liability, Subject to Master Netting Arrangement, before Offset Investments in LIHTC: Investments In LIHTC [Member] Investments In LIHTC Schedule of Loans Held for Sale at Fair Value Under the Fair Value Option Fair Value Option, Disclosures [Table Text Block] Interest revenue- investment securities Securities Investment [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] 2025 Sales-Type and Direct Financing Leases, Payment to be Received, Year Two Goodwill [Roll Forward] Goodwill [Roll Forward] Level 3 Fair Value, Inputs, Level 3 [Member] Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Customer derivative positions Customer Swap Position [Member] Represents the customer swap positions. Debt securities available-for-sale Fair Value Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Interest revenue: Interest and Dividend Income, Operating [Abstract] 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. Schedule of Balance and Activity in the ACL by Portfolio Segment Financing Receivable, Allowance for Credit Loss [Table Text Block] Long-term debt Long-Term Debt, Fair Value AFS Fair value hedge of AFS debt securities Debt Securities, Available-For-Sale [Member] Debt Securities, Available-For-Sale Net income Net income Net of tax Net Income (Loss) Derivative Contract [Domain] Derivative Contract [Domain] Days Past Due Category, Over 90 Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Postage, printing and supplies Supplies and Postage Expense LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Purchases of preferred stock Stock repurchased value Stock Repurchased During Period, Value Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Released / Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Unrealized holding gains on derivatives, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Plan vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Expected useful life of acquired intangible (in years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Extension from modification Financing Receivable, Modified, Extension From Modification Financing Receivable, Modified, Extension From Modification Employees Employee [Member] Employee Other Commitments [Table] Other Commitments [Table] AFS, Fair Value Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Home equity Home Equity Line of Credit [Member] Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Commercial MBS, Agency & GSEs 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). Measurement Basis [Axis] Measurement Basis [Axis] CET1 capital Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Fair Value Measurement [Domain] Fair Value Measurement [Domain] Fair Value, Less than 12 Months Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value United Community Bank Subsidiaries [Member] Common stock dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Unrealized holding losses, Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Schedule of Amortized Cost and Fair Value of AFS and HTM Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] CET1 capital, Well-Capitalized Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Residential mortgage servicing rights Residential Mortgage Servicing Asset At Fair Value, Amount Residential Mortgage Servicing Asset At Fair Value, Amount Purchase price Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Derivative assets, measurement input Derivative Asset, Measurement Input Dealer offsets to bifurcated embedded derivatives Dealer Offsets To Bifurcated Embedded Derivatives [Member] Represents the dealer offsets to bifurcated embedded derivatives. Pledged securities Asset Pledged as Collateral [Member] Manufactured housing Manufactured Housing Loan [Member] Manufactured Housing Loan Pledged Status [Axis] Pledged Status [Axis] 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] Commercial MBS Commercial Mortgage-Backed Securities [Member] Product and Service [Domain] Product and Service [Domain] 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 Mortgage loan gains and other related fees Fair Value, Option, Changes in Fair Value, Gain (Loss) Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Total interest expense Interest Expense Net cash paid for whole branch disposal Payments For Branch Disposal, Investing Activities Payments For Branch Disposal, Investing Activities Intangible asset acquired Finite-Lived Intangible Assets Acquired Outstanding, Weighted Average Remaining Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Remainder of 2023 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Mortgage banking derivatives Mortgage Banking Derivatives [Member] Information of Mortgage banking derivatives. AFS debt securities: Debt Securities, Available-for-Sale [Abstract] Entity File Number Entity File Number Amortization of unrealized losses, Net of Tax Amount Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), Available For Sale To Held To Maturity, After Tax Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), 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 Discount rate Measurement Input, Discount Rate [Member] Cash flow hedge Interest Rate Cash Flow Hedge Liability at Fair Value Liabilities assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Realized losses on AFS securities: AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Amortization of intangibles Amortization of Intangible Assets Entity Shell Company Entity Shell Company Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Loans held for sale Financing Receivable, Held-for-Sale Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Asset Class [Axis] Asset Class [Axis] Estimated residual value of leased equipment Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Computation of basic and diluted earnings per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Fair Value, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Common stock issued (in shares) Common Stock, Shares, Issued Released / Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Gross Unrealized Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Total assets Assets, Fair Value Disclosure Unrealized Loss, Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Long-term debt Long-Term Debt Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Other financing inflows Proceeds From Other Financing Activities Proceeds From Other Financing Activities Reliant Acquisition Reliant Acquisition [Member] Reliant Acquisition Schedule of Estimated Aggregate Amortization Expense for Future Periods Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Net unrealized losses, Before-tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Recognition period for unrecognized compensation expense (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Schedule of Additional Information Related to Acquired Loan Portfolio Additional Information Related To Acquired Loan [Table Text Block] Tabular disclosure of the amounts recognized as additional information related to the acquired loan. Stock Conversion Description [Axis] Stock Conversion Description [Axis] Comprehensive income (loss), Net of Tax Amount Comprehensive Income (Loss), Net of Tax, Attributable to Parent Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Debt securities available-for-sale: Debt Securities Available-For-Sale And Equity Securities [Abstract] Debt Securities Available-For-Sale And Equity Securities [Abstract] CET1 capital, Minimum Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Aggregate Intrinsic Value, Released / Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Impact of acquisitions Common stock issued and options converted Stock Issued During Period, Value, Acquisitions SBA/USDA loan servicing rights SBA Servicing Rights [Member] Represents SBA servicing rights. Entity Address, Address Line One Entity Address, Address Line One Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Receivable Type [Axis] Receivable Type [Axis] Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Subsequent Event [Table] Subsequent Event [Table] Options, Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] 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 Total capital Banking Regulation, Total Capital, Actual Income producing commercial real estate Income producing commercial real estate Income Producing Commercial Real Estate [Member] Property that represents income producing commercial real estate. Average total assets for the leverage ratio Regulatory Asset Subsequent event Subsequent Event [Member] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] PCD loans: Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract] 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] Fair Value, 12 Months or More Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Income Statement [Abstract] Income Statement [Abstract] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Prepayment rate Measurement Input, Prepayment Rate [Member] Derivative financial instruments Derivative Liability Supplemental consolidated pro forma net income (loss) Business Acquisition, Pro Forma Net Income (Loss) HTM, Fair Value, Not due at single maturity Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Impact of equity-based compensation awards Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Carrying amount Equity Method Investments Purchased loans Financial Asset Acquired with Credit Deterioration [Member] Leverage ratio, Minimum Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum Risk-weighted assets Banking Regulation, Risk-Weighted Assets, Actual Minimum future lease payments expected to be received Sales-Type and Direct Financing Leases, Payment to be Received, Fiscal Year Maturity [Abstract] Financial Instrument [Axis] Financial Instrument [Axis] Accrued interest receivable Accrued interest receivable Interest Receivable Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Vested / Exercisable (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. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Significant non-cash investing and financing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Reliant Reliant Bancorp, Inc [Member] Reliant Bancorp, Inc Deferred compensation plan assets Deferred Compensation Plan Assets Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Retained earnings Retained Earnings (Accumulated Deficit) Derivative assets - mortgage Derivative Assets Mortgage [Member] Derivative Assets Mortgage Amortization of unrealized losses, Before-tax Amount Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), Available For Sale To Held To Maturity, Before Tax Other Comprehensive Income, Amortization Of Unrealized Gain (Loss), Available For Sale To Held To Maturity, Before Tax Other Commitments [Line Items] Other Commitments [Line Items] Entity Address, State or Province Entity Address, State or Province First Miami Bancorp, Inc First Miami Bancorp, Inc [Member] First Miami Bancorp, Inc Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Residential MBS Residential Mortgage-Backed Securities [Member] Renewable energy investments: Renewable Energy Investments [Member] Renewable Energy Investments Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Net income per common share: Earnings Per Share, Basic [Abstract] Noninterest income: Noninterest Income [Abstract] Net decrease in short-term borrowings Proceeds from Short-Term Debt Securities Debt Securities, Available-for-Sale and Held-to-Maturity, after Allowance for Credit Loss Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Asset Class [Domain] Asset Class [Domain] Total gross derivative instruments Derivative Asset, Subject to Master Netting Arrangement, before Offset Tier 1 capital Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual Reclassification adjustment for losses included in net income, Tax (Expense) Benefit Income tax expense (benefit) attributable to sales Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Class of Stock [Domain] Class of Stock [Domain] Assets acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule of Fair Value, off-Balance-Sheet Risks [Table] Schedule of Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Net income available to common shareholders, basic Net income available to common shareholders, basic Net Income (Loss) Available to Common Stockholders, Basic Options, Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Payment Delay & Extension Payment Delay And Extension [Member] Payment Delay And Extension Federal funds and other short-term investments Federal Funds Sold And Other Short-Term Investments Federal Funds Sold And Other Short-Term Investments Unearned income Sales Type And Direct Financing Leases, Deferred Selling Profit Sales Type And Direct Financing Leases, Deferred Selling Profit Investments in LIHTC: Carrying amount Amortization Method Qualified Affordable Housing Project Investments Unrealized holding losses, Before-tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Schedule of Restricted Stock Units and Options Outstanding and Activity Share-Based Payment Arrangement, Activity [Table Text Block] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Dealer offsets to customer derivative positions Dealer Offset To Customer Swap Position [Member] Represents the dealer offset to customer swap position. 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 Total noninterest expenses Noninterest Expense Amortization of defined benefit pension plan net periodic pension cost components: Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] 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 Income tax benefit related to expense for share-based awards Share-Based Payment Arrangement, Expense, Tax Benefit Net income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Total capital, Minimum Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Recognized on hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Common stock, $1 par value: 200,000,000 shares authorized, 118,975,652 and 106,222,758 shares issued and outstanding, respectively Common Stock, Value, Issued Allowance for credit losses, AFS portfolio Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Schedule of Presentation of Assets Measured at Fair Value on Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization of unrealized losses on held-to-maturity securities transferred from available-for-sale, Net of Tax Amount OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), After Tax OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), After Tax Pledging Purpose [Axis] Pledging Purpose [Axis] Entity Filer Category Entity Filer Category Unrealized Loss, 12 Months or More Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Purchases Payments to Acquire Held-to-Maturity Securities Mortgage loans held for sale Mortgages Held-For-Sale, After Nonrecurring Fair Value Adjustment, Carrying Value Mortgages Held-For-Sale, After Nonrecurring Fair Value Adjustment, Carrying Value Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Repurchase program authorized amount Stock Repurchase Program, Authorized Amount Long-term debt Long-term debt interest expense Interest Expense, Long-Term Debt Recognized on derivatives Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments HTM debt securities Fair Value Fair value Debt Securities, Held-to-Maturity, Fair Value Net Investment in Leases Net Investment in Lease, before Allowance for Credit Loss [Abstract] Originated in current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Pass Pass [Member] Debt securities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Gains from sales of other loans Gain (Loss) on Sale of Loans and Leases Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Schedule of Changes in the Carrying Amounts of Goodwill Schedule of Goodwill [Table Text Block] Preferred stock outstanding (in shares) Preferred Stock, Shares Outstanding Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Entity Listings [Table] Entity Listings [Table] Common stock issuable: 608,646 and 607,128 shares, respectively Common Stocks Issuable Represents amount of carrying amount of common stock issuable. Prior service cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Tier 1 capital, Minimum Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Nonaccrual loans with an allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Allowance Amount of financing receivable on nonaccrual status with an allowance for credit loss. Nonrecurring Fair Value, Nonrecurring [Member] Derivative Assets Derivative Asset [Member] Represents Derivative Asset. Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Equity investments, outflows Payments to Acquire Other Investments Amortization of unrealized losses on HTM securities transferred from AFS: Accumulated Amortization Of Losses 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. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Corporate bonds, measurement input Debt Securities, Available-for-Sale, Measurement Input Total shareholders' equity Beginning balance Ending balance Equity, Attributable to Parent Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Fair value Business Combination, Acquired Receivable, Fair Value 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] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] AFS, Amortized Cost, More than 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Subsequent Events [Abstract] Subsequent Events [Abstract] Unrealized losses on available-for-sale securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Income before income taxes Net income, Before-tax Amount Total before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 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 Current period gross charge-offs, in prior year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Net increase in loans Payments for (Proceeds from) Loans and Leases Stock repurchase conversion ratio Stock Repurchase Share Conversion Ratio Stock Repurchase Share Conversion Ratio Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Servicing rights for SBA/USDA loans, measurement input Servicing Asset, Measurement Input Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Hedging Designation [Domain] Hedging Designation [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Originated in prior year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Preferred stock liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference, Value Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Period Focus Document Fiscal Period Focus Loans receivable Loans Receivable [Member] Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities 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 Stock based compensation Share-Based Payment Arrangement, Noncash Expense Weighted Average Weighted Average [Member] Reclassifications Out of AOCI Disclosure of Reclassification Amount [Text Block] ACL - unfunded commitments, Beginning Balance ACL - unfunded commitments, Ending Balance Off-Balance-Sheet, Credit Loss, Liability City Area Code City Area Code Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Earnings Per Share Earnings Per Share [Text Block] Product and Service [Axis] Product and Service [Axis] Commitments to extend credit Commitments to Extend Credit [Member] Other Other expense Other Noninterest Expense Document Fiscal Year Focus Document Fiscal Year Focus Total deposits Deposits Unrealized holding gains on derivatives, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Interest-bearing deposits Interest-Bearing Deposit Liabilities Commitments to fund equity investments Commitments To Fund Equity Investments Commitments To Fund Equity Investments 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 Receivables [Abstract] Receivables [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] HTM, Fair Value Debt Securities, Held-to-Maturity, Fair Value, Rolling Maturity [Abstract] Common stock dividends Dividends, Common Stock, Cash Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total liabilities Liabilities, Fair Value Disclosure Derivative assets Derivative Financial Instruments, Assets [Member] Derivative Liability Derivative Liability [Abstract] Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] 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 Extended weighted average maturity Financing Receivable, Modified, Weighted Average Term Increase from Modification Derivative instruments designated as cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Occupancy Occupancy, Net Total liabilities and shareholders' equity Liabilities and Equity Cash and due from banks Cash and Due from Banks Residential mortgage servicing rights, measurement input Residential Mortgage Servicing Asset Measurement Input Residential Mortgage Servicing Asset, Measurement Input Net income available to common shareholders, diluted Net income available to common shareholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Number of banking branches Number Of Branches Represents number of branches operated by entity. Entity Address, City or Town Entity Address, City or Town AFS, Amortized Cost, Not due at single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost HTM, Amortized Cost, More than 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 10 Repurchase program remaining authorization Stock Repurchase Program, Remaining Authorized Repurchase Amount Derivatives designated as hedging instruments Derivative Instruments in Hedges, Assets, at Fair Value Net increase (decrease) in deposits Increase (Decrease) in Deposits Fair value hedge Fair Value Hedge Assets Common stock authorized (in shares) Common Stock, Shares Authorized Commercial construction Construction Loans [Member] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Short-term borrowings Total Short-Term Debt Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Summary of AFS debt securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Modified subsequent default Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default Measurement Input Type [Axis] Measurement Input Type [Axis] HTM, Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] 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 Derivative [Line Items] Derivative [Line Items] Leverage ratio Banking Regulation, Tier 1 Leverage Capital Ratio, Actual Title of Individual [Domain] Title of Individual [Domain] Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Capital surplus Additional Paid in Capital Loans and leases, net Loans Receivable, Fair Value Disclosure Loans and leases held for investment Total loans Total loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Minimum future lease payments receivable Sales-type and Direct Financing Leases, Lease Receivable Derivative liabilities Derivative Liabilities Derivative Financial Instruments, Liabilities [Member] Pledged Status [Domain] Pledged Status [Domain] Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three Risk participations Risk participations Risk Participations [Member] Represents information about risk participations. Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] 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 Outstanding, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Impact of equity-based compensation awards (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Interest-bearing deposits in banks Interest-Bearing Deposits in Banks and Other Financial Institutions Entity Registrant Name Entity Registrant Name Other assets Increase (Decrease) in Other Operating Assets 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two 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] Vested / Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price 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. Entity Central Index Key Entity Central Index Key Liabilities: Liabilities, Fair Value Disclosure [Abstract] Amount of Gain (Loss) Recognized in Income on Derivatives Derivative, Gain (Loss) on Derivative, Net Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Compensation expense Share-Based Payment Arrangement, Expense Interest expense- long term debt Long-Term Debt [Member] Intangibles subject to amortization, gross Finite-Lived Intangible Assets, Gross Loans held for investment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Total other comprehensive loss, Net of Tax Amount Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Net investment in leases Net investment in leases Net Investment in Lease, before Allowance for Credit Loss Schedule of Accrued Interest Receivable Schedule Of Debt Securities Accrued Interest Receivable [Table Text Block] Schedule Of Debt Securities Accrued Interest Receivable 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. Amortization of unrealized losses on held-to-maturity securities transferred from available-for-sale, Before-tax amount OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), Before Tax OCI, Debt Securities, Available-For-Sale, Transfer To Held-To-Maturity, Adjustment From AOCI For Amortization Of Unrealized Gain (Loss), Before Tax Payment Delay Payment Deferral [Member] Amendment Flag Amendment Flag Reclassification of unrealized losses, Net of Tax Amount Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, After Tax Other​ Comprehensive​ Income​ (Loss), ​Unrealized Gain (Loss), Reclassification ​Adjustment, ​Available For Sale To Held To Maturity, After Tax Thereafter Sales-Type and Direct Financing Leases, Lease Receivable, To Be Received, After Year Four Sales-Type and Direct Financing Leases, Lease Receivable, To Be Received, After Year Four Fair Value Hedging Fair Value Hedging [Member] Reclassification adjustment for losses included in net income, Before-tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Less: Cash collateral received/pledged Derivative Asset, Fair Value of Collateral Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Other operating expense Other Operating Expense [Member] Other Operating Expense Net interest revenue Interest Income (Expense), Net Assets: Assets, Fair Value Disclosure [Abstract] 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 Post-Modification Amortized Cost by Type of Modification Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Core deposit intangible Core Deposits [Member] Outside services - electronic banking Noninterest Expense, Outside Services Electronic Banking Noninterest Expense, Outside Services Electronic Banking Financial instruments whose contract amounts represent credit risk: Unused Commitments to Extend Credit Non-credit discount Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) Current period gross charge-offs, three years prior Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Economic hedge, not designated as hedging instrument Not Designated as Hedging Instrument, Economic Hedge [Member] Derivative Asset Derivative Asset [Abstract] Interest expense- deposits Deposits [Member] Securities losses, net Securities gains (losses), net Debt Securities, Available-for-Sale, Realized Gain (Loss) Pull through rate Measurement Input, Pull Through Rate [Member] Measurement Input, Pull Through Rate [Member] 2024 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Noninterest expenses: Operating Expenses [Abstract] Gross realized losses Debt Securities, Available-for-Sale, Realized Loss Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Net amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-Term Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Loans held for sale Increase (Decrease) in Loan, Held-for-Sale Total assets Assets Net assets acquired Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Regulatory Capital Requirements Under Banking Regulations [Abstract] Regulatory Capital Requirements Under Banking Regulations Salaries and employee benefits Salaries and employee benefits expense Labor and Related Expense 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. Overnight and Continuous Maturity Overnight [Member] Released / 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 Number of HTM debt securities in unrealized loss position Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Number of extensions Financing Receivable, Modified, Number Of Extensions Financing Receivable, Modified, Number Of Extensions Total other comprehensive loss, Before-tax Amount Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Derivatives designated as hedging instruments Derivative Instruments in Hedges, Liabilities, at Fair Value Bank owned life insurance Bank Owned Life Insurance Amortized Cost Hedged Asset, Fair Value Hedge Common stock issued in acquisition Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Gross contractual amounts receivable Business Combination, Acquired Receivables, Gross Contractual Amount Bank-owned life insurance 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. Schedule of Short-Term Debt [Table] Schedule of Short-Term Debt [Table] Tier 1 capital Banking Regulation, Tier 1 Risk-Based Capital, Actual Business combinations Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Business Combination And Provisional Adjustment Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Business Combination And Provisional Adjustment Estimated Aggregate Amortization Expense For Future Periods Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Statement [Line Items] Statement [Line Items] Mortgage loan gains and other related fees Mortgage Banking [Member] Schedule of Fair Value of Derivative Financial Instruments on Consolidated Balance Sheet Schedule of Derivative Instruments [Table Text Block] Short-term borrowings Interest Expense, Other Short-Term Borrowings Schedule of Amortized Cost Basis, Unrealized Gains and Losses and Fair Value of AFS Debt Securities Debt Securities, Available-for-Sale [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Debt Securities, Available For Sale And Held To Maturity [Table] Debt Securities, Available For Sale And Held To Maturity [Table] Debt Securities, Available For Sale And Held To Maturity [Table]