Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Realized gains (losses) on AFS securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Restricted Stock Units Restricted Stock Units [Abstract] Restricted Stock Units Letters of credit Letter of Credit [Member] CET1 capital Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual Actuarial (gains) losses Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Consolidated Entities [Axis] Consolidated Entities [Axis] Vested (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. Differences between the provision for income taxes and statutory federal income tax rate Effective Income Tax Rate Reconciliation, Amount [Abstract] Premium amortization expense excluded from assessment of hedge effectiveness Loss from Components Excluded from Assessment of Cash Flow Hedge Effectiveness Preferred stock outstanding (in shares) Preferred Stock, Shares Outstanding Mortgage banking - loan commitment Mortgage Banking Loan Commitment [Member] Represents information of mortgage banking - loan commitment. Receivable Type [Axis] Receivable Type [Axis] Merger-related and other charges Merger-related and other charges Merger-related and other Business Combination, Acquisition Related Costs Derivative financial instruments Derivative Liability Common stock dividends Dividends, Common Stock, Cash Security Exchange Name Security Exchange Name Equity securities with readily determinable fair values Equity Securities, FV-NI, Current 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 Net defined benefit pension plan activity, Net of Tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Preferred stock dividends Dividends, Preferred Stock Operating lease, weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term 2025 subordinated debentures Two Thousand Twenty Five Subordinated Debentures [Member] Represents information of 2025 subordinated debentures. Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Total other comprehensive (loss) income, Before-tax Amount Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Service charges and other related fees Noninterest Income, Other Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] Proceeds from issuance of long-term debt, net of issuance costs Proceeds from Issuance of Other Long-term Debt Additional awards remaining available under plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Deferred compensation plan liability Deferred Compensation Liability, Current and Noncurrent Short-term deferrals related to COVID-19 crisis Financing Receivable, COVID Related Deferral Financing Receivable, COVID Related Deferral Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Not designated as hedging instrument, economic hedge Not Designated as Hedging Instrument, Economic Hedge [Member] Sublease income and rental income from owned properties under operating leases Operating Lease, Lease Income Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Acquired intangible assets Deferred Tax Liabilities, Intangible Assets Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Exercised during period, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Goodwill adjustment increase (decrease) Goodwill, Purchase Accounting Adjustments Thereafter Time Deposit Maturities, after Year Five Schedule of details regarding amounts reclassified out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [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 Fair value hedging Fair Value Hedging [Member] Fair value hedge of brokered CDs Brokered Certificate Of Deposit [Member] Represents the brokered certificate of deposits. Subsequent Event Type [Domain] Subsequent Event Type [Domain] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Amortization of intangibles Amortization of Intangible Assets Expected useful life of acquired intangible (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Repurchase program remaining authorization Stock Repurchase Program, Remaining Authorized Repurchase Amount Unrealized gains on AFS securities Deferred Tax Liabilities, Unrealized Gains On Securities Available For Sale Deferred Tax Liabilities, Unrealized Gains On Securities Available For Sale Net DTA Net DTA Deferred Tax Assets, Net Antidilutive securities excluded from computation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Operating lease, weighted average discount rate (percent) Operating Lease, Weighted Average Discount Rate, Percent Subsequent Events [Abstract] Subsequent Events [Abstract] Assets acquired, fair value Fair Value of Assets Acquired Business Combination and Asset Acquisition [Abstract] Carrying amount of Assets (Liabilities) Hedged Liability, Fair Value Hedge Business Acquisition [Axis] Business Acquisition [Axis] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Cash flow hedging Cash Flow Hedging [Member] Fair value adjustments included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Loans Past Due, over 90 Days Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Award Type [Domain] Award Type [Domain] Estimated aggregate amortization expense for future periods Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Fair value Business Combination, Acquired Receivable, Fair Value Local Phone Number Local Phone Number Nonrecurring Fair Value, Nonrecurring [Member] Amortization of net actuarial losses Defined Benefit Plan, Amortization of Gain (Loss) Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Condensed Income Statement [Table] Condensed Income Statement [Table] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Schedule of amortized cost and fair value of AFS and HTM securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Originated four years prior Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Risk-based ratios: Banking Regulation, Risk-Based Information [Abstract] Preferred stock issued Preferred Stock, Value, Issued Servicing Assets and Liabilities Transfers and Servicing of Financial Assets [Text Block] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Entity Listings [Line Items] Entity Listings [Line Items] Intangible asset acquired Finite-lived Intangible Assets Acquired Four Oaks Statutory Trust I Four Oaks Statutory Trust I [Member] Represents information about Four Oaks Statutory Trust I. Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Mortgage loan revenue Mortgage Loan Revenue [Member] Information of mortgage loan revenue. Total deposits Deposits Deposits Interest expense: Interest Expense [Abstract] True tax leases Deferred Tax Liabilities, Leasing Arrangements Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Time Deposits Deposit Liabilities Disclosures [Text Block] Unfunded plan Defined Benefit Plan, Unfunded Plan [Member] Non-credit discount Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) Schedule of AFS debt securities in an unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] Dividend date of record Dividends Payable, Date of Record HTM debt securities Fair Value Fair value Debt Securities, Held-to-maturity, Fair Value Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Loans receivable Loans Receivable [Member] Schedule of Servicing Assets at Fair Value [Table] Schedule of Servicing Assets at Fair Value [Table] Mortgage banking - forward sales commitment Mortgage Banking Forward Sales Commitment [Member] Represents mortgage banking - forward sales commitment. Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Basic (in dollars per share) Earnings Per Share, Basic AFS, Amortized Cost, 5 to 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Loans Past Due, 30 - 59 Days Financial Asset, 30 to 59 Days Past Due [Member] Schedule of condensed balance sheets Condensed Balance Sheet [Table Text Block] Fair Value, 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Loans and leases, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss De-designated hedges De Designated Cash Flow Hedge [Member] Represents de-designated cash flow hedge. Tax-exempt interest revenue Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Units outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Balance at beginning of period Balance at end of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Schedule of the contract amount of off-balance sheet instruments Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] Other Other expense Other Noninterest Expense Fair Value Measurement [Domain] Fair Value Measurement [Domain] Total capital, Well Capitalized Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Schedule of loans modified under the terms of a TDR, including TDR loans that defaulted Financing Receivable, Troubled Debt Restructuring [Table Text Block] Adoption of new accounting standard Adoption of CECL Cumulative Effect, Period of Adoption, Adjustment [Member] Originated servicing rights capitalized upon sale of loans Servicing Asset at Fair Value, Additions Pass Pass [Member] 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Derivative financial instruments Total gross derivative instruments Derivative Asset, Fair Value, Gross Asset Premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment Unrealized holding gains (losses) on derivatives, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Deferred compensation plan assets Deferred Compensation Plan Assets Estimated loss rate Measurement Input, Estimated Loss Rate [Member] Measurement Input, Estimated Loss Rate 2024 Time Deposit Maturities, Year Three Residential MBS, Agency & GSE Residential Mortgage-Backed Securities, Issued By US Government Sponsored Enterprises [Member] Debt securities collateralized by residential real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). Consumer Consumer Portfolio Segment [Member] Entity Voluntary Filers Entity Voluntary Filers Assets: Assets, Fair Value Disclosure [Abstract] Long-term debt Total long-term debt Long-term Debt Servicing rights roll forward Servicing Asset at Fair Value, Amount [Roll Forward] Level 1 Fair Value, Inputs, Level 1 [Member] Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Other liabilities Other Liabilities Schedule of loans by aging category and accrual status Financing Receivable, Past Due [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] 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 State taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Entity Small Business Entity Small Business Future minimum lease payments Lessee, Operating Lease, Liability, Payment, Due [Abstract] Schedule of balance and activity in the ACL by portfolio segment Financing Receivable, Allowance for Credit Loss [Table Text Block] Commitment For Additional Fund Commitment For Additional Fund Represents commitment for additional fund. Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Fair Value, Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Total time deposits Time Deposits Derivatives designated as hedging instruments Derivative Instruments in Hedges, Assets, at Fair Value Equity compensation Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount Scenario [Axis] Scenario [Axis] Capital surplus Additional Paid in Capital Schedule of changes in obligations and plan assets Schedule of Defined Benefit Plans Disclosures [Table Text Block] LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Tax benefit related to uncertain tax positions that increases income from continuing operations Unrecognized Tax Benefits that Would Impact Effective Tax Rate 2024 Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three Hedging Relationship [Domain] Hedging Relationship [Domain] Interest rate swaps Interest Rate Swap [Member] Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 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. Entity Interactive Data Current Entity Interactive Data Current 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Core deposit intangible Core deposit intangible Core Deposits [Member] Total settlement loss upon plan termination Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Initial direct costs Sales Type And Direct Financing Leases, Initial Direct Costs Sales Type And Direct Financing Leases, Initial Direct Costs Gross gains on sales Debt Securities, Available-for-sale, Realized Gain Retirement Plan Name [Axis] Retirement Plan Name [Axis] Mortgage loan gains and related fees Mortgage Banking [Member] Transfers of Financial Assets Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Sales, Policy [Policy Text Block] Balance Sheet Location [Domain] Balance Sheet Location [Domain] United Community Bank Subsidiaries [Member] Balance at beginning of year Balance at end of year Unrecognized Tax Benefits Income Tax Authority [Domain] Income Tax Authority [Domain] Total DTAs Deferred Tax Assets, Gross Thereafter Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Entity Address, State or Province Entity Address, State or Province PCD loans: Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract] Net deferred tax asset Deferred Income Tax Assets, Net Common stock issued for acquisitions Stock Issued During Period, Value, Acquisitions Receivable [Domain] Receivable [Domain] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Beginning balance (shares) Ending balance (shares) Shares, Outstanding Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Premises and equipments Property, Plant and Equipment, Net, by Type [Abstract] Unrealized Loss, Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss Accrued penalties and interest Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Schedule Of Servicing Asset [Line Items] Schedule Of Servicing Asset [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Accounting Policies [Abstract] Accounting Policies [Abstract] 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 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 Outstanding, Weighted Average Remaining Term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Derivative Instrument [Axis] Derivative Instrument [Axis] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Operating lease liability Present value of lease liability Operating Lease, Liability Document Transition Report Document Transition Report Common stock, $1 par value; 200,000,000 and 150,000,000 shares authorized, respectively; 89,349,826 and 86,675,279 shares issued and outstanding, respectively Common Stock, Value, Issued Weighted-average recognition period for unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Beginning balance, outstanding (in dollars per share) Ending balance, outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Operating Leases Lessee, Operating Leases [Text Block] Vesting period of benefits Defined Contribution Plan, Period Of Time Until Benefits Vest Defined Contribution Plan, Period Of Time Until Benefits Vest 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] Bifurcated embedded derivatives and dealer offsets Bifurcated Embedded Derivatives And Dealer Offsets [Member] Bifurcated embedded derivatives and dealer offsets. AFS, Fair Value, Not due at single maturity Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Funded status - end of year (plan assets less benefit obligations) Defined Benefit Plan, Funded (Unfunded) Status of Plan Acquisitions Business Combination Disclosure [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Other Commitments [Table] Other Commitments [Table] Total loans sold Financing Receivable, Sale Income (loss) before equity in undistributed earnings of subsidiaries Income (Loss) Before Equity In Undistributed Earnings Of Subsidiaries Income (Loss) Before Equity In Undistributed Earnings Of Subsidiaries Schedule of restricted stock units and options outstanding and activity Share-based Payment Arrangement, Activity [Table Text Block] Amendments to defined benefit pension plans, Before-tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Cash flow hedge of trust preferred securities Trust Preferred Securities Hedge [Member] Trust Preferred Securities Hedge Derivative Liability Derivative Liability [Member] Represents Derivative Liability. Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Legal Entity [Axis] Legal Entity [Axis] Dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Goodwill [Line Items] Goodwill [Line Items] HTM, Amortized Cost, 1 to 5 years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Class of Stock [Axis] Class of Stock [Axis] Real estate valuation changes Real Estate Valuation [Member] Real Estate Valuation Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Supplemental consolidated pro forma net income Business Acquisition, Pro Forma Net Income (Loss) ACL Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Financing Receivable, Allowance for Credit Loss 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. Loan origination costs Deferred Tax Liabilities, Deferred Expense, Debt Issuance Costs Merger-related costs Acquisition-related Costs [Member] Net interest revenue Interest Income (Expense), Net Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Roll Forward] Income Tax Authority [Axis] Income Tax Authority [Axis] Prepayment rate assumption Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed 100 bps adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate Post-Modification Outstanding Recorded Investment by Type of Modification Financing Receivable, Troubled Debt Restructuring, Postmodification Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Entity [Domain] Entity [Domain] 2026 subordinated debentures Two Thousand Twenty Six Subordinated Debentures [Member] Two Thousand Twenty Six Subordinated Debentures Common stock dividends (in dollars per share) Cash dividend declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Performance-based restricted stock units Performance Based Restricted Stock Units [Member] Performance Based Restricted Stock Units [Member] 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 Nonqualified share based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Goodwill and other intangible assets Intangible Assets, Net (Including Goodwill) [Abstract] Loans and Leases and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Options Stock options Share-based Payment Arrangement, Option [Member] Termination of defined benefit pension plan, Net of Tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Equity [Abstract] Equity [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Comprehensive income, Tax (Expense) Benefit Comprehensive Income Loss Tax Represents amount of comprehensive income loss tax. Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Measurement Input Type [Domain] Measurement Input Type [Domain] Fair Value, Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Variable Rate [Axis] Variable Rate [Axis] Tier 1 leverage ratio, Minimum Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum TDRs Financing Receivable, Troubled Debt Restructuring Loans and Leases Financing Receivable [Policy Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Variable Rate [Domain] Variable Rate [Domain] 2022 senior debentures Two Thousand Twenty Two Senior Debentures [Member] Represents information of 2022 senior debentures. Equity investments, outflows Payments to Acquire Other Investments Capital Surplus Additional Paid-in Capital [Member] Loan portfolio Loan Portfolio [Member] Loan Portfolio [Member] Average total assets Regulatory Assets 2027-2031 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Actual revenue included since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Debt securities held-to-maturity (fair value $1,148,804 and $437,193, respectively) Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Schedule of changes in residential mortgage servicing rights Servicing Asset at Amortized Cost [Table Text Block] Other liabilities Increase (Decrease) in Other Operating Liabilities Long-term debt Long-term Debt, Fair Value Mortgage Loans Held for Sale Mortgage Loans Held For Sale [Abstract] Mortgage Loans Held For Sale Purchases of common stock (shares) Shares repurchased (in shares) Stock Repurchased and Retired During Period, Shares Maximum High Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Net of Tax Amount Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, After Tax Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, After Tax Beginning of period End of period Fair value of retained servicing assets Servicing rights for SBA/USDA loans Servicing Asset at Fair Value, Amount Dividend date declared Dividends Payable, Date Declared Award Type [Axis] Award Type [Axis] Equity investments, inflows Proceeds From Other Investments Proceeds From Other Investments Financing activities: Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Schedule of future minimum lease payments under operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of ROU asset and operating lease liability Schedule Of Right-Of-Use Assets And Lease Liabilities, Operating [Table Text Block] Schedule Of Right-Of-Use Assets And Lease Liabilities, Operating Total shareholders’ equity Beginning balance Ending balance Shareholders’ equity Stockholders' Equity Attributable to Parent Contractual maturities of time deposits Time Deposits, Fiscal Year Maturity [Abstract] Service charges and fees Deposit Account [Member] City Area Code City Area Code Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Security deposits Sales Type And Direct Financing Leases, Security Deposits Sales Type And Direct Financing Leases, Security Deposits Compensation expense related to acquisition Share-Based Compensation Arrangement By Share-Based Payment Award, Cost Related To Acquisition Share-Based Compensation Arrangement By Share-Based Payment Award, Cost Related To Acquisition Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Discretionary contributions to deferred compensation plan Deferred Compensation Arrangement With Individual, Discretionary Contributions by Employer Deferred Compensation Arrangement With Individual, Discretionary Contributions by Employer Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Designated as hedging instrument Designated as Hedging Instrument [Member] Comprehensive income, 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 Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Impact of other equity plans (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 CET1 capital, Well Capitalized Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum Gross Unrealized Gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Repurchase of common stock Payments for Repurchase of Common Stock Estimated useful life (in years) Property, Plant and Equipment, Useful Life Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] 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 Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Shares issued in connection with DRIP (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Begin to expire in 2025 Net Operating Loss Carry Forwards Begin To Expire In Two Zero Two Five [Member] Net Operating Loss Carry Forwards Begin To Expire In Two Zero Two Five 2022 Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One 20% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Equipment financing Equipment financing loans Equipment Financing [Member] Represents information related to equipment financing. Current Current Income Tax Expense (Benefit) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Deferred income tax benefit related to compensation expense for awards Share-based Payment Arrangement, Expense, Tax Benefit Derivative Assets Derivative Asset [Abstract] Lease liability Deferred Tax Assets, Lease Liability Deferred Tax Assets, Lease Liability Debt Security Category [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Restricted Stock Units Restricted stock units Restricted Stock Units (RSUs) [Member] Derivatives not designated as hedging instruments Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Schedule of purchased assets and assumed liabilities and supplementary information Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Taxable Interest Income, Securities, Operating, Taxable Employer match of employee contributions (percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Match Total DTLs Deferred Tax Liabilities, Gross Business Acquisition [Line Items] Business Acquisition [Line Items] AFS, Amortized Cost, More than 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Income Statement [Abstract] Statement of Operations Income Statement [Abstract] Total expenses Condensed Income Statement, Total Expense Condensed Income Statement, Total Expense Entity Registrant Name Entity Registrant Name Asset Class [Domain] Asset Class [Domain] Summary of sources and expected tax consequences of future taxable deductions (revenue) Components of Deferred Tax Assets and Liabilities [Abstract] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Nonaccrual Loans Nonaccrual Loans Financing Receivable, Nonaccrual Loans Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Cancelled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Measurement period adjustment increase to accrued interest receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Interest Receivable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Interest Receivable Income tax expense Net income, Tax (Expense) Benefit Income tax benefit Total income tax expense Income Tax Expense (Benefit) 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Decrease (increase) in loans held for sale Increase (Decrease) in Loans Held-for-sale Entity Tax Identification Number Entity Tax Identification Number Change in plan assets, at fair value: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Purchases of debt securities available-for-sale and equity securities Payments To Acquire Available For Sale Securities Debt And Equity Securities Payments To Acquire Available For Sale Securities Debt And Equity Securities Document Fiscal Period Focus Document Fiscal Period Focus Total Lessee, Operating Lease, Liability, to be Paid Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Dividends from other subsidiaries Dividend Income, Received From Consolidated Subsidiaries, Other Dividend Income, Received From Consolidated Subsidiaries, Other Reclassification of losses on derivative instruments recognized in net income, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Debt securities held-to-maturity: Debt Securities Held To Maturity [Abstract] Debt Securities Held To Maturity [Abstract] Investment in Bank Investments In Bank Represents amount related to Investments In Bank. Statement of Financial Position [Abstract] Balance Sheet Statement of Financial Position [Abstract] Converted stock options Business Combination, Consideration Transferred, Converted Stock Options Business Combination, Consideration Transferred, Converted Stock Options Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Fair Value of Financial Instruments Fair Value Measurement, Policy [Policy Text Block] Servicing Rights Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Derivative Instruments [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Retirement Plan Funding Status [Domain] Defined Benefit Plan, Funding Status [Domain] Substandard Substandard [Member] Equity Component [Domain] Equity Component [Domain] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Customer derivatives and dealer offsets Customer Derivatives And Dealer Offsets [Member] Information of Customer Derivatives And Dealer Offsets. HELOC Home Equity Line of Credit [Member] DTAs: Components of Deferred Tax Assets [Abstract] Common stock issued in acquisition Common stock issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Unrealized holding gains (losses) on derivatives, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Structure Extended Maturity [Member] Common stock issued for acquisitions (shares) Stock Issued During Period, Shares, Acquisitions Other Other Income Amortization of losses included in net income on AFS securities transferred to HTM Accumulated Amortization Of Gains Included In Net Income On Available For Sale Securities Transferred To Held To Maturity [Member] Represents accumulated amortization of gains included in net income on available for sale securities transferred to held to maturity. Unrealized gains on cash flow hedges Deferred Tax Liabilities, Unrealized Gain On Cash Flow Hedge Deferred Tax Liabilities, Unrealized Gain On Cash Flow Hedge Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Liabilities: Liabilities [Abstract] BOLI earnings Income Tax Reconciliation, Bank Owned Life Insurance Earnings Income Tax Reconciliation, Bank Owned Life Insurance Earnings 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Unrealized losses on AFS securities Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss Weighted average Weighted Average Weighted Average [Member] Income before income taxes Net income, Before-tax Amount Total before tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Schedule of carrying amount of goodwill and other intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of carrying amount and cumulative fair value hedging adjustments on hedged liability Schedule Of Fair Value Hedging Instruments, Carrying Value And Basis Adjustments [Table Text Block] Schedule Of Fair Value Hedging Instruments, Carrying Value And Basis Adjustments [Table Text Block] Auditor Location Auditor Location Total gains and losses Derivative, Gain (Loss) on Derivative, Net Fair Value, Total Debt Securities, Available-for-sale, Unrealized Loss Position Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of computation of basic and diluted net income per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Tax exempt Interest Income, Securities, Operating, Tax Exempt Tier 1 capital, Minimum Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum Service period to receive matching contribution Defined Contribution Plan, Service Period To Qualify For Matching Contributions Defined Contribution Plan, Service Period To Qualify For Matching Contributions Total other comprehensive (loss) income, Net of Tax Amount Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of presentation of assets measured at fair value on nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] 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 Title of 12(b) Security Title of 12(b) Security Schedule of loans held for sale at fair value under the fair value option Fair Value Option, Disclosures [Table Text Block] Securities (gains) losses, net Realized Investment Gains (Losses) AFS, Amortized Cost, Not due at single maturity Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Common stock authorized (in shares) Common Stock, Shares Authorized Net income available to common shareholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Title of Individual [Axis] Title of Individual [Axis] Net income available to common shareholders, basic Net income available to common shareholders, basic Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Preferred stock dividend per preferred share (in dollars per share) Preferred Stock, Dividends Per Share, Declared Consideration transferred Business Combination, Consideration Transferred [Abstract] Product and Service [Domain] Product and Service [Domain] Interest Rate (percent) Debt Instrument, Interest Rate, Stated Percentage 2026 Time Deposit Maturities, Year Five Net amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Reclassification adjustment for (gains) losses recognized in net income, Before-tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Contingent consideration Business Combination, Contingent Consideration, Liability Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Long-term debt Long-term debt interest expense Interest Expense, Long-term Debt Executive officers, certain key employees, and board of directors Executive Officers, Certain Key Employees, Board Of Directors [Member] Executive Officers, Certain Key Employees, Board Of Directors [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Reclassification adjustment for (gains) losses recognized in net income, Net of Tax Amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Total noninterest income Noninterest Income Schedule of operating lease income and expense and other supplemental information Lease, Cost [Table Text Block] Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] State State and Local Jurisdiction [Member] Interest-bearing deposits in banks Interest-bearing Deposits in Banks and Other Financial Institutions Cash Flow [Line Items] Cash Flow [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Hedging Relationship [Axis] Hedging Relationship [Axis] Assets acquired Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Interest expense Interest Expense [Member] Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Subsequent Events Subsequent Events [Text Block] Total ACL, Recoveries Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Recovery Financing Receivable Allowance For Credit Loss And Off-Balance Sheet Credit Loss Liability, Recovery Investment Securities Investment, Policy [Policy Text Block] Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Prior service cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Net cash provided by (used in) financing activities Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Weighted average common shares outstanding: Weighted average common shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Vesting period under plan Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Penalties and interest related to income taxes Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Other lending and loan servicing fees Other Lending And Loan Servicing Fees Other Lending And Loan Servicing Fees Fair Value Measurements Fair Value Disclosures [Text Block] TDRs Modified Within the Year That Have Subsequently Defaulted, Recorded Investment Financing Receivable, Troubled Debt Restructuring, Subsequent Default Cash and due from banks Cash and Due from Banks Schedule of contractual maturities of time deposits, including brokered time deposits Time Deposit Maturities [Table Text Block] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Overdrawn deposit accounts Bank Overdrafts 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Special Mention Special Mention [Member] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] AFS Available-for-sale Securities [Member] Acquisition Activities Business Combinations Policy [Policy Text Block] Loans serviced for others not included in balance sheet Continuing Involvement with Derecognized Transferred Financial Assets, Amount Outstanding Derivative [Table] Derivative [Table] Net cash flow hedge activity, Before-tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Interest revenue: Interest and Dividend Income, Operating [Abstract] Document Period End Date Document Period End Date ACL - unfunded commitments, Beginning Balance ACL - unfunded commitments, Ending Balance Off-Balance Sheet, Credit Loss, Liability Commercial & industrial Commercial And Industrial Classification [Member] Commercial And Industrial Classification[Member] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net unrealized (losses) gains, Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Schedule of key characteristics, inputs, and economic assumptions used to estimate the fair value of SBA/USDA loans servicing asset and sensitivity Schedule of Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Table Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Options, Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Tax (Expense) Benefit Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, Tax Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, Tax Schedule of premises and equipment Property, Plant and Equipment [Table Text Block] Funded Plan United-Palmetto Funded Plan [Member] United-Palmetto Funded Plan [Member] 2025 Time Deposit Maturities, Year Four Income Statement Location [Domain] Income Statement Location [Domain] 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. Unrealized Loss, 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss RWAs Banking Regulation, Risk-Weighted Assets, Actual Accrued interest receivable Interest Receivable Premises and equipment, net Premises and equipment, net Property, Plant and Equipment, Net Land and land improvements Land and Land Improvements [Member] Derivative assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Derivative Assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Derivative Assets Preferred stock redemption price (in dollars per share) Preferred Stock, Redemption Price Per Share Mortgage loans held for sale Fair value Mortgages Held-for-sale, Fair Value Disclosure Other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Repayment of long-term debt Repayments of Long-term Debt Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Repayment of long-term debt Repayments of Other Long-term Debt Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Premises and equipment, gross Property, Plant and Equipment, Gross Total revenue Revenues Schedule of condensed statements of income Condensed Income Statement [Table Text Block] Minimum future lease payments expected to be received Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract] Other Commitments [Line Items] Other Commitments [Line Items] Beginning balance, outstanding (in dollars per share) Ending balance, outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Interest-bearing deposits Interest-bearing Deposit Liabilities Unrealized holding gains (losses) on derivatives, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Number of AFS debt securities in unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Guaranteed portion of SBA/USDA loans SBA USDA Guaranteed Loans [Member] SBA USDA Guaranteed Loans [Member] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Proceeds from sales and maturities of debt securities available-for-sale and equity securities Proceeds from Sale and Maturity of Debt and Equity Securities, FV-NI, Held-for-investment Entity Current Reporting Status Entity Current Reporting Status Beginning plan assets Plan assets - end of year Defined Benefit Plan, Plan Assets, Amount Restricted Stock Units, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Amendments to defined benefit pension plans,, Tax (Expense) Benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax Other Noninterest Income, Other Operating Income Supranational entities Other Debt Obligations [Member] Shared service fees from subsidiaries Shared Service Fees From Subsidiaries Shared Service Fees From Subsidiaries Southern Bancorp Capital Trust I Southern Bancorp Capital Trust One [Member] Represents information of Southern bancorp capital trust I. Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Discount rate Measurement Input, Discount Rate [Member] Effect of hedging relationships on interest expense: Summary of Derivative Instruments Impact on Results of Operations [Abstract] 2026 Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five Measurement period adjustment increase to cash and cash equivalents Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Cash Equivalents Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Cash Equivalents 2022 Time Deposit Maturities, Year One Net increase in deposits Increase (Decrease) in Deposits Leases [Abstract] Leases [Abstract] Net investment in leases Net investment in leases Net Investment in Lease, before Allowance for Credit Loss Income Taxes Income Tax, Policy [Policy Text Block] Net defined benefit pension plan activity, Before-tax Amount Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent LIBOR London Interbank Offered Rate (LIBOR) [Member] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Audit Information [Abstract] Audit Information Nonaccrual loans with an allowance Financing Receivable, Nonaccrual, With Allowance Amount of financing receivable on nonaccrual status with an allowance for credit loss. Uncertain tax positions Deferred Tax Liability Uncertain Tax Positions This element represents amount of deferred tax liability uncertain tax position. Total noninterest expenses Noninterest Expense Entity Address, Postal Zip Code Entity Address, Postal Zip Code Revenue from Contracts with Customers Revenue from Contract with Customer [Policy Text Block] HTM, Fair Value, 5 to 10 years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Cash dividend from Bank paid to Holding Company Dividends from Bank Dividend Income, Received From Consolidated Subsidiaries, Bank Dividend Income, Received From Consolidated Subsidiaries, Bank Income Taxes Income Tax Disclosure [Text Block] Servicing liabilities Servicing Liability Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Less: Cash collateral received/pledged Derivative Asset, Fair Value of Collateral Basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate AFS, Amortized Cost, Within 1 year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Schedule of nonaccrual loans by loan class Financing Receivable, Nonaccrual [Table Text Block] Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income Schedule of Net Benefit Costs [Table Text Block] Owner occupied commercial real estate Owner Occupied Commercial Real Estate [Member] Represents information of owner occupied commercial real estate. Statement of Cash Flows [Abstract] Statement of Cash Flows Statement of Cash Flows [Abstract] Class of Stock [Line Items] Class of Stock [Line Items] Loans, net Loans Receivable, Fair Value Disclosure Occupancy Occupancy, Net Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One 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. Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Purchase loans Financial Asset Acquired with Credit Deterioration [Member] ACL - Loans Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Impact of other equity plans Stock Issued During Period, Value, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Stock Issued During Period, Value, Dividend Reinvestment Plan, Employee Benefit Plans, And Deferred Compensation Organization and Basis of Presentation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Wealth management fees Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions Cash paid for shares withheld to cover payroll taxes related to equity instruments Payment, Tax Withholding, Share-based Payment Arrangement Adjustment to reserve for uncertain tax positions Income Tax Reconciliation Change in Reserves for Uncertain Tax Positions This element represents amount of income tax reconciliation change in reserves for uncertain tax positions. Purchased assets and assumed liabilities recorded at their acquisition date fair values and consideration transferred Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Schedule of minimum amounts required for capital adequacy purposes Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Employer matching contribution maximum percent of employee's eligible compensation (percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Current Fiscal Year End Date Current Fiscal Year End Date Total loans Financing Receivable, before Allowance for Credit Loss Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Proceeds from Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Before-tax Amount Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, Before Tax Other Comprehensive Income, Reclassification Adjustment For Available For Sale Transferred To Held To Maturity Securities, Before Tax Reclassifications Out of AOCI Disclosure of Reclassification Amount [Text Block] Risk Category [Domain] Risk Category [Domain] Risk Category [Domain] Tidelands Statutory Trust I Tidelands Statutory Trust One [Member] Represents information of Tidelands statutory trust one. Originated two years prior Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year HTM, Amortized Cost, More than 10 years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Statement [Table] Statement [Table] Accounting Standards Updates and Recently Adopted Standards New Accounting Pronouncements, Policy [Policy Text Block] Other Deferred Tax Assets, Other 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Disposals Servicing Asset at Fair Value, Disposals Unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Preferred stock, $1 par value: 10,000,000 shares authorized; Series I, $25,000 per share liquidation preference; 4,000 shares issued and outstanding Preferred stock carrying amount Preferred Stock, Including Additional Paid in Capital, Net of Discount Expired (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expired, Weighted Average Grant Date Fair Value Represents the weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Schedule of gains and losses recognized in income on derivatives not designated as hedging instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Number of HTM debt securities in unrealized loss position Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Statistical Measurement [Axis] Statistical Measurement [Axis] Subsequent event Subsequent Event [Member] Accrued interest receivable Interest Receivable and Other Assets [Abstract] Total intangibles subject to amortization, net Finite-Lived Intangible Assets, Net Goodwill Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill ROU asset, balance sheet line item Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Salaries and employee benefits expense Salaries And Employee Benefits [Member] Salaries And Employee Benefits [Member] Operating lease liabilities recognized Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease Liabilities Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] 2028 subordinated debentures Two Thousand Twenty Eight Subordinated Debentures [Member] Represents information of 2028 subordinated debentures. Unrealized Loss, Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Purchase accounting premium Sales Type And Direct Financing Leases, Purchase Accounting Premium Sales Type And Direct Financing Leases, Purchase Accounting Premium Operating lease liability, balance sheet line item Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Tax credit investments Effective Income Tax Rate Reconciliation, Tax Credit, Amount Scenario [Domain] Scenario [Domain] Schedule of changes in the carrying amounts of goodwill Schedule of Goodwill [Table Text Block] Loans and leases held for investment Total loans Total loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Subsequent Event Type [Axis] Subsequent Event Type [Axis] Aquesta Aquesta Financial Holdings, Inc [Member] Aquesta Financial Holdings, Inc Operating lease cost Operating Lease, Cost Gains from other loan sales, net Gain (Loss) on Sales of Loans, Net Reclassifications related to defined benefit pension plan activity Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Entity Listings [Table] Entity Listings [Table] Maximum remaining maturity of financial instruments having no defined maturity Maximum Remaining Maturity Of Financial Instruments Having No Defined Maturity Maximum remaining maturity of financial instruments having no defined maturity. Schedule of loans sold Schedule Of Financing Receivables Sold, Loans [Table Text Block] Schedule Of Financing Receivables Sold, Loans Unrealized Loss, 12 Months or More Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Deferred income tax expense Deferred Income Tax Expense (Benefit) Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] BOLI Bank Owned Life Insurance [Policy Text Block] Disclosure of accounting policy for information of Bank owned life insurance. AFS, Amortized Cost Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] Deposits Deposit interest expense Interest Expense, Deposits Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Net deferred tax asset Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Repurchase program authorized amount Stock Repurchase Program, Authorized Amount Hedging Designation [Domain] Hedging Designation [Domain] FinTrust FinTrust [Member] FinTrust Earnings Per Common Share Earnings Per Share, Policy [Policy Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [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 Net income Net income Net Income (Loss) Attributable to Parent Tier 1 capital, Well Capitalized Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum ROU asset Operating Lease, Right-of-Use Asset Stock Options Stock Options [Abstract] Stock Options Noninterest-bearing demand Noninterest-bearing Deposit Liabilities Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Interest cost Defined Benefit Plan, Interest Cost Income Statement Location [Axis] Income Statement Location [Axis] Condensed Financial Statements of United Community Banks, Inc. (Holding Company Only) Condensed Financial Information of Parent Company Only Disclosure [Text Block] Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Operating Segments Segment Reporting, Policy [Policy Text Block] Begin to expire in 2022 Net Operating Loss Carry Forwards Begin To Expire In Two Zero Two Two [Member] Net Operating Loss Carry Forwards Begin To Expire In Two Zero Two Two Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 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. Proceeds from sales of premises and equipment Proceeds from sale of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets HTM, Amortized Cost, Not due at single maturity Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date Retirement Benefits [Abstract] Retirement Benefits [Abstract] Unrealized Loss, Less than 12 Months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss FDIC assessments and other regulatory charges Federal Deposit Insurance Corporation Premium Expense Entity File Number Entity File Number Depositary shares, each representing 1/1000th interest in a share of Series I Non-Cumulative Preferred Stock Depositary share on Series I perpetual non-cumulative preferred stock Depositary Share On UCBI Series I Non-Cumulative Preferred Stock [Member] Depositary Share On UCBI Series I Non-Cumulative Preferred Stock Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Schedule of amortized cost basis, unrealized gains and losses, and fair value of AFS debt securities Debt Securities, Available-for-sale [Table Text Block] 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. Retirement Plan Name [Domain] Retirement Plan Name [Domain] Credit concentration risk Credit Concentration Risk [Member] AFS, Fair Value, More than 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Bifurcated embedded derivatives Bifurcated Embedded Derivative [Member] Represents the bifurcated embedded derivatives. Unrealized gains (losses) on available-for-sale securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Net assets acquired Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Transaction costs Income Tax Reconciliation Tax Transaction Costs Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to transaction costs. Variable lease cost Variable Lease, Cost Estimate of contractual cash flows not expected to be collected Business Combination, Acquired Receivables, Estimated Uncollectible Net actuarial gain (loss) on defined benefit pension plans, Net of Tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Hedge Accounting Basis Adjustment Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Liability Class [Axis] Liability Class [Axis] 2030 senior debentures Two Thousand Thirty Senior Debentures [Member] Two Thousand Thirty Senior Debentures Schedule of amortized cost basis, unrealized gains and losses and fair value of HTM debt securities Debt Securities, Held-to-maturity [Table Text Block] Actual net income included since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual ACL - loans, (Release) Provision Financing Receivable, Credit Loss, Expense (Reversal) 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 SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Title of Individual [Domain] Title of Individual [Domain] Corporate bonds, measurement input Debt Securities, Available-for-sale, Measurement Input Proceeds from maturities and calls Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Unrealized holding (losses) gains, Net of Tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Net unrealized (losses) gains, Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Customer derivative positions Customer Swap Position [Member] Represents the customer swap positions. Total income Condensed Income Statement, Income Condensed Income Statement, Income Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, 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. ASSETS Assets [Abstract] Proceeds from sale of other real estate owned Proceeds from Sale of Other Real Estate Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Derivatives and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Schedule of AFS securities sales activity Schedule of Realized Gain (Loss) [Table Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Concentration risk, percentage Concentration Risk, Percentage Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Discount rate for disclosures (percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate HTM Held-to-maturity Securities [Member] Debt Instrument [Axis] Debt Instrument [Axis] Revolvers Financing Receivable, Excluding Accrued Interest, Revolving AFS debt securities: Debt Securities, Available-for-sale [Abstract] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Advertising and public relations Marketing and Advertising Expense Non-PCD loans: Business Combination, Acquired Receivables [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Less: Amounts subject to master netting agreements Derivative Liability, Not Offset, Policy Election Deduction Less allowance for credit losses - loans and leases Less ACL - loans ACL - loans, Beginning Balance ACL - loans, Ending Balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Purchases of common stock Stock Repurchased and Retired During Period, Value 2025 Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four ROU assets resulting in net increase in operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Schedule of summarizes the sources and expected tax consequences of future taxable deductions (revenue) Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Commercial MBS, Agency & GSE Commercial Mortgage-Backed Securities, Issued By US Government Sponsored Enterprises [Member] Debt securities collateralized by commercial real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac). Fair value adjustments included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Net actuarial gain (loss) on defined benefit pension plans, Before-tax Amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Amortization of losses included in net income on terminated derivative financial instruments previously accounted for as cash flow hedges, Tax (Expense) Benefit Other Comprehensive Income Loss Amortization Of Losses Included In Net Income On Terminated Derivative Financial Instruments Which Previously Accounted For As Cash Flow Hedges Tax Represents the amount of tax expense (benefit) related to amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges. Prime Rate Prime Rate [Member] Number of derivative contracts Number of Interest Rate Derivatives Held Losses 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 Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Derivatives designated as hedging instruments Derivative Instruments in Hedges, Liabilities, at Fair Value Number of operating segments Number of Operating Segments 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Increase in net DTA Deferred Tax Assets, Net, Increase Due To Business Combination And Adoption Of Accounting Standards Deferred Tax Assets, Net, Increase Due To Business Combination And Adoption Of Accounting Standards ACL - Held-to-Maturity Securities, Available-For-Sale Securities, and Off-Balance Sheet Credit Exposures Credit Loss, Financial Instrument [Policy Text Block] Accrued interest receivable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Interest Receivables Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Interest Receivables Short-term borrowings Interest Expense, Other Short-term Borrowings Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Total loans Financing Receivable, 90 Days or More Past Due, Still Accruing Loss Contingencies Commitments and Contingencies, Policy [Policy Text Block] Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Fair value hedge Fair Value Hedge Liabilities TDRs Modified Within the Previous Twelve Months That Have Subsequently Defaulted, Number of Contracts Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Residential mortgage servicing rights Residential Mortgage Servicing Asset At Fair Value, Amount Residential Mortgage Servicing Asset At Fair Value, Amount Compensation expense related to 401(k) Plan Defined Contribution Plan, Cost Restricted Stock Units, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Intangible assets acquired Core deposit intangible Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Other Other Type Of Modification [Member] Represents type of modification other not defined elsewhere. Dealer offsets to bifurcated embedded derivatives Dealer Offsets To Bifurcated Embedded Derivatives [Member] Represents the dealer offsets to bifurcated embedded derivatives. Investment in limited partnerships Investment In Limited Partnerships Represents investment in limited partnerships. Construction Construction Construction Loans [Member] Preferred stock dividend rate (percent) Preferred Stock, Dividend Rate, Percentage Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-maturity [Table] Other operating expenses Other Operating Income (Expense) [Member] Total consideration Total fair value of consideration transferred Business Combination, Consideration Transferred Noninterest income: Noninterest Income [Abstract] Long-term debt, gross Long-term Debt, Gross Changes in carrying amount of goodwill Goodwill [Roll Forward] Amortization of losses included in net income on terminated derivative financial instruments previously accounted for as cash flow hedges, Net of Tax Amount Other Comprehensive Income Loss Amortization Of Losses Included In Net Income On Terminated Derivative Financial Instruments Which Previously Accounted For As Cash Flow Hedges Net Of Tax Represents the amount after tax related to amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges. Servicing assets Deferred Tax Liabilities, Mortgage Servicing Rights Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Total assets Loans Assets, Fair Value Disclosure Reconciliation of the beginning and ending unrecognized tax benefit Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Net interest revenue after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Changes in fair value due to change in inputs or assumptions used in the valuation Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions Schedule of key characteristics, inputs, and economic assumptions used to estimate the fair value of residential mortgage loans servicing asset and sensitivity Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Total liabilities and shareholders’ equity Liabilities and Equity Time deposits (excluding brokered time deposits) that met or exceeded FDIC insurance limit Time Deposits, at or Above FDIC Insurance Limit Originated in prior year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Mortgage banking derivatives Mortgage Banking Derivatives [Member] Information of Mortgage banking derivatives. 2026 Lessee, Operating Lease, Liability, to be Paid, Year Five Net unrealized (losses) gains, Before-tax Amount OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Add (deduct): Add Deduct [Abstract] Exercised (in dollars per shares) Weighted average exercise price of stock options (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price AFS, Fair Value, 5 to 10 years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid HTM, Amortized Cost, Within 1 year Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Net amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Cash Flow [Table] Cash Flow [Table] Disclosure of information about cash flow. Net defined benefit pension plan activity, Tax (Expense) Benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Derivative liabilities Derivative Financial Instruments, Liabilities [Member] Derivative [Line Items] Derivative [Line Items] HTM debt securities: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Tier 1 leverage ratio Banking Regulation, Tier One Leverage Capital Ratio, Actual Earnings Per Share Earnings Per Share [Text Block] Noninterest expenses: Operating Expenses [Abstract] Retirement Plan Funding Status [Axis] Defined Benefit Plan, Funding Status [Axis] Contractually specified servicing fees earned by United on servicing rights Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Minimum Low Minimum [Member] Derivative assets - customer derivative positions Derivative Assets Customer Derivative Positions [Member] Derivative Assets Customer Derivative Positions 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Estimated residual value of leased equipment Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Sales Type And Direct Financing Leases, Unguaranteed Residual Asset Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Termination of Funded Plan Accumulated Defined Benefit Plans Adjustment, Net Loss On Plan Termination [Member] Accumulated Defined Benefit Plans Adjustment, Net Loss On Plan Termination [Member] Preferred stock authorized (in shares) Preferred Stock, Shares Authorized HTM, Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Supplementary information Business Combination, Separately recognized Transactions, Additional Disclosures [Abstract] Loan purchase accounting adjustments Deferred Tax Assets Loan Purchase Accounting Adjustment Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from loan purchase accounting adjustment. Fair Value, 12 Months or More Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Debt securities available-for-sale and equity securities with readily determinable fair values: Debt Securities Available-For-Sale And Equity Securities [Abstract] Debt Securities Available-For-Sale And Equity Securities [Abstract] Issuance of preferred stock Stock Issued During Period, Value, New Issues Compensation expense related to acceleration of vesting Share-based Payment Arrangement, Accelerated Cost Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Net cash received in (paid for) acquisitions Net cash (paid) received for acquisition Payments to Acquire Businesses, Net of Cash Acquired Schedule of income tax expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] ACL - unfunded commitments, (Release) Provision Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) AFS, Fair Value, Within 1 year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Equity Compensation Plans Share-based Payment Arrangement [Text Block] Senior debentures Senior Notes [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Cash dividends on common stock Payments of Ordinary Dividends, Common Stock Operating Leases Lessee, Leases [Policy Text Block] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Issuance of stock (in shares) Stock Issued During Period, Shares, New Issues Servicing Asset at Amortized Cost [Table] Servicing Asset at Amortized Cost [Table] Number of reportable segments Number of Reportable Segments Dividend Restrictions Dividend Restrictions [Policy Text Block] Represents disclosure of accounting policy for dividend restrictions. Unsettled sales of government guaranteed loans Unsettled Sales Of Government Guaranteed Loans Represents unsettled sales of government guaranteed loans. Income producing commercial real estate Income Producing Commercial Real Estate [Member] Property that represents income producing commercial real estate. Acquisitions Goodwill, Acquired During Period Basis of accounting Basis of Accounting, Policy [Policy Text Block] Current Loans Financial Asset, Not Past Due [Member] Postage, printing and supplies Supplies and Postage Expense Commitments and contingencies Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company ACL- loans, Initial ACL - PCD loans Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase Accounting Policies [Line Items] Accounting Policies [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Schedule of fair value of derivative financial instruments on consolidated balance sheet Schedule of Interest Rate Derivatives [Table Text Block] Receivables [Abstract] Receivables [Abstract] AFS, Fair Value Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] Auditor Name Auditor Name Cover [Abstract] Cover [Abstract] CET1 capital, Minimum Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum Adjusted Balance Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Net Investment in Leases Net Investment in Lease, before Allowance for Credit Loss [Abstract] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Trust preferred securities Trust Preferred Securities [Member] Represents information of trust preferred securities. Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Less discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Net actuarial gain (loss) on defined benefit pension plans, Tax (Expense) Benefit Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Pension plan settlement expense Defined Benefit Plan, Plan Settlement Expense Upon Plan Termination The expense recognized related to defined benefit plan termination. Schedule of condensed statements of cash flows Condensed Cash Flow Statement [Table Text Block] Unrealized holding (losses) gains, Tax (Expense) Benefit OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Financial Instrument [Axis] Financial Instrument [Axis] Shares issued in acquisition (in shares) Common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Debt securities available-for-sale Fair Value Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Vested (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. Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Allowance for credit losses, HTM portfolio Debt Securities, Held-to-maturity, Allowance for Credit Loss Derivative instruments designated as cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract] Reliant Reliant Bancorp, Inc [Member] Reliant Bancorp, Inc Option and warrant equity instruments converted Business Combination, Consideration Transferred, Option And Warrant Equity Interests Converted Business Combination, Consideration Transferred, Option And Warrant Equity Interests Converted Carrying Amount Reported Value Measurement [Member] Gross Unrealized Losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Derivative assets - mortgage Derivative Assets Mortgage [Member] Derivative Assets Mortgage Payments for (Proceeds from) Loans and Leases Payments for (Proceeds from) Loans and Leases Common stock, par value $1 per share Common Stock Common Stock [Member] Professional fees Professional Fees Gains from other loan sales, net Gain (Loss) on Sale of Loans and Leases Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Hedging Designation [Axis] Hedging Designation [Axis] Securities gains (losses), net Net gains (losses) on sales of securities Securities gains (losses), net Debt Securities, Available-for-sale, Realized Gain (Loss) Stock-based compensation Stock-based compensation Share-based Payment Arrangement, Noncash Expense Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value ROU asset Deferred Tax Liabilities, Right Of Use Assets Deferred Tax Liabilities, Right Of Use Assets Total other comprehensive (loss) income, Tax (Expense) Benefit Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Equity in undistributed earnings of subsidiaries Equity in undistributed earnings of the subsidiaries Income (Loss) from Subsidiaries, Net of Tax Acquired servicing rights Servicing Asset At Fair Value, Acquired Servicing Asset At Fair Value, Acquired Net income (expense) recognized Gain (Loss) on Derivative Instruments, Net, Pretax Purchases Payments to Acquire Debt Securities, Available-for-sale Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]  Number of Contracts Financing Receivable, Modifications, Number of Contracts Less: Cash collateral received/pledged Derivative Liability, Fair Value of Collateral Notional Amount Derivative, Notional Amount Debt Security Category [Axis] Debt Security Category [Axis] Loans Held for Sale Financing Receivable, Held-for-sale [Policy Text Block] Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Unamortized pension actuarial losses and prior service cost Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions United contributions to the plan Employer contribution Defined Benefit Plan, Plan Assets, Contributions by Employer Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Repayment of Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities Reclassification adjustment for (gains) losses recognized 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 Total liabilities Liabilities 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 Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price 2027 senior debentures Two Thousand Twenty Seven Senior Debentures [Member] Represents information of 2027 senior debentures. Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Measurement Input Type [Axis] Measurement Input Type [Axis] Net operating loss carryforwards Operating Loss Carryforwards Dealer offsets to customer derivative positions Dealer Offset To Customer Swap Position [Member] Represents the dealer offset to customer swap position. Common stock issued (in shares) Common Stock, Shares, Issued Deferred gains on SBA/USDA loan sales Deferred Tax Assets, Deferred Gain On SBA USDA Loan Sales Deferred Tax Assets, Deferred Gain On SBA USDA Loan Sales Preferred stock issued (in shares) Preferred Stock, Shares Issued Other non-cash consideration Other Non-Cash Consideration Other Non-Cash Consideration Series I perpetual non-cumulative preferred stock UCBI Series I Non-Cumulative Preferred Stock [Member] UCBI Series I Non-Cumulative Preferred Stock HTM, Fair Value, Within 1 year Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Schedule of weighted-average assumptions used to determine pension benefit obligations Defined Benefit Plan, Assumptions [Table Text Block] Entity Address, City or Town Entity Address, City or Town Gross losses on sales Debt Securities, Available-for-sale, Realized Loss Residential mortgage Residential mortgage servicing rights Residential Mortgage [Member] Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans Proceeds From Issuance Of Common Stock For Dividend Reinvestment and Employee Benefit Plans Represents amount of cash inflow from the amount received from the stock plan and capital contributions to an entity associated with a dividend reinvestment plan during the period. Schedule of estimated future benefit payments expected to be paid Schedule of Expected Benefit Payments [Table Text Block] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Schedule of reconciliation of the beginning and ending unrecognized tax benefit related to uncertain tax positions Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Net cash flow hedge activity, Net of Tax Amount Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Balance Sheet Location [Axis] Balance Sheet Location [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Total interest expense Total interest expense presented in the consolidated statements of income Interest expense Interest Expense Total interest revenue Investment securities interest revenue Interest and Dividend Income, Operating Loans Past Due, 60 - 89 Days Financial Asset, 60 to 89 Days Past Due [Member] Begin to expire in 2031 Net Operating Loss Carry Forwards Begin To Expire In Two Zero Three One [Member] Net Operating Loss Carry Forwards Begin To Expire In Two Zero Three One [Member] 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year One Retained earnings Retained Earnings (Accumulated Deficit) Exercisable period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] ACL - loans, Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Shares issued through ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Proceeds from exercise of options and warrants Proceeds From Exercise Of Options And Warrants Proceeds From Exercise Of Options And Warrants Entity Filer Category Entity Filer Category Schedule of changes in SBA/USDA servicing rights Schedule of Servicing Assets at Fair Value [Table Text Block] Net cash flow hedge activity, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent U.S. Treasuries U.S. Treasuries US Treasury Securities [Member] Fair Value Estimate of Fair Value Measurement [Member] Common stock issuable under the deferred compensation plan (shares) Common Stock Issuable Shares Under Deferred Compensation Plan This element represents common stock issuable shares under deferred compensation plan. Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Lending and loan servicing expense Loan Portfolio Expense Accounting Standards Updates and Recently Adopted Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Common stock issuable; 595,705 and 600,834 shares, respectively Common Stocks Issuable Represents amount of carrying amount of common stock issuable. Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Amendment Flag Amendment Flag Proceeds from issuance of long-term debt, net of issuance costs Proceeds from Issuance of Long-term Debt Funded plan Defined Benefit Plan, Funded Plan [Member] Commercial Commercial Portfolio Segment [Member] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Equity Components [Axis] Equity Components [Axis] Derivative Asset Derivative Asset [Member] Represents Derivative Asset. 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Right-of-use assets recognized Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right-Of-Use Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right-Of-Use Assets Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Net cash provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities State tax credits Tax Credit Carryforward, Amount Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Furniture and equipment Furniture and equipment Furniture and Fixtures [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Transfers and Servicing [Abstract] Transfers and Servicing [Abstract] Residential Residential Portfolio Segment [Member] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Service cost Defined Benefit Plan, Service Cost Income taxes paid Income Taxes Paid, Net Investment in other subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Number of banking offices Number Of Branches Represents number of branches operated by entity. 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Liabilities: Liabilities, Fair Value Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Nonaccrual loans with no allowance Financing Receivable, Nonaccrual, No Allowance Three Shores Three Shores Bancorporation, Inc. [Member] Three Shores Bancorporation, Inc. Compensation expense Share-based Payment Arrangement, Expense Payable due Business Combination, Consideration Transferred, Liabilities Incurred Exercisable, Weighted Average Remaining Term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Goodwill and other intangible assets, net Total goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Net income per common share: Earnings Per Share, Basic and Diluted [Abstract] 2023 Time Deposit Maturities, Year Two Salaries and employee benefits Salaries and employee benefits expense Labor and Related Expense Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Summary of HTM debt securities in an unrealized loss position Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract] U.S. Government agencies & GSEs US Government-sponsored Enterprises Debt Securities [Member] Schedule of accrued interest receivable Schedule Of Debt Securities Accrued Interest Receivable [Table Text Block] Schedule Of Debt Securities Accrued Interest Receivable Liabilities assumed Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, 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. Construction in progress Construction in Progress [Member] Originated five or more years prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Common Stock Issuable Common Stock Issuable [Member] Common stock issuable. Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Transferred to foreclosed property Real Estate Owned, Transfer to Real Estate Owned ACL at acquisition Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Allowance for credit losses, AFS portfolio Debt Securities, Available-for-sale, Allowance for Credit Loss Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Land improvements Land Improvements [Member] Purchases Payments to Acquire Held-to-maturity Securities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Intangibles subject to amortization, gross Finite-Lived Intangible Assets, Gross Gross contractual amounts receivable Business Combination, Acquired Receivables, Gross Contractual Amount Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deposits Unrealized holding (losses) gains, Before-tax Amount OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax 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 Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Schedule of actual results and pro forma information Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Vested, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Balance at beginning of period Balance at end of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Outside services - electronic banking Noninterest Expense, Outside Services Electronic Banking Noninterest Expense, Outside Services Electronic Banking Recurring Fair Value, Recurring [Member] Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Financial instruments whose contract amounts represent credit risk Unused Commitments to Extend Credit Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Common and Preferred Stock Stockholders' Equity Note Disclosure [Text Block] Decreases resulting from a lapse in the applicable statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Reclassifications related to derivative financial instruments accounted for as cash flow hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Measurement Basis [Axis] Measurement Basis [Axis] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Schedule of components of net investment in leases Schedule of Components of Leveraged Lease Investments [Table Text Block] Pull through rate Measurement Input, Pull Through Rate [Member] Measurement Input, Pull Through Rate [Member] Auditor Firm ID Auditor Firm ID Commitments to extend credit Commitments to Extend Credit [Member] Revolvers converted to term loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Net cash (used in) provided by investing activities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Accumulated benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Buildings and improvements Buildings and improvements Building and Building Improvements [Member] Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Tier 1 leverage ratio, Well Capitalized Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum FinTrust and Aquesta FinTrust And Aquesta [Member] FinTrust And Aquesta Deferred Deferred Other Tax Expense (Benefit) Vested (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 Fair value hedge Fair Value Hedge Assets Credit Loss Status [Axis] Credit Loss Status [Axis] HTM, Amortized Cost, 5 to 10 years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year Five through Ten Class of Stock [Domain] Class of Stock [Domain] Cash consideration Cash Payments to Acquire Businesses, Gross Cash dividends on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Regulatory Capital Requirements Under Banking Regulations [Abstract] Regulatory Capital Requirements Under Banking Regulations Schedule of minimum future lease payments expected to be received from equipment financing lease contracts Sales-type and Direct Financing Leases, Lease Receivable, Maturity [Table Text Block] Reclassification of losses on derivative instruments recognized in net income, Tax (Expense) Benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plans, 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. Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] FMBT First Madison Acquisition [Member] First Madison Acquisition [Member] Originated three years prior Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Schedule Of Servicing Asset [Table] Schedule Of Servicing Asset [Table] Represents the tabular information of servicing asset. Discount rate for net periodic benefit cost (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Debt securities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Other investing outflows Payments For Other Investing Activities Payments For Other Investing Activities Loans held for sale at fair value Loans Held-for-sale, Fair Value Disclosure Asset-backed securities Asset-backed Securities [Member] Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Other noninterest income Other Noninterest Income [Member] Information of other noninterest income [Member] Risk Category [Axis] Risk Category [Axis] Risk Category Securities purchase accounting adjustments Deferred Tax Liabilities, Securities Purchase Accounting Adjustments Deferred Tax Liabilities, Securities Purchase Accounting Adjustments Derivative financial instruments Total gross derivative instruments Derivative Liability, Fair Value, Gross Liability Income tax expense on pretax income at statutory rates Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Deposits Deposit Balance Sheet Account [Member] Deposit Balance Sheet Account [Member] BOLI Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Bank Owned Life Insurance Represents amount of Bank owned life insurance recognized as of the acquisition date. 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