Total loans Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Cash dividends on common stock (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid FHLB advances and other borrowings Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-Term Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Weighted Average Payment Delay (in months) Financing Receivable, Modified, Weighted Average Payment Delay From Modification Financing Receivable, Modified, Weighted Average Payment Delay From Modification Statistical Measurement [Domain] Statistical Measurement [Domain] Premises, equipment, and software Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Retail loan substandard period (in days) Retail Loan Downgraded To Substandard Delinquency status upon which a retail loan is downgraded to substandard Investment securities HTM, Amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date [Abstract] Merger-Related Costs [Axis] Merger-Related Costs [Axis] Merger-Related Costs Award Timing Predetermined Award Timing Predetermined [Flag] Commitments to land additional funds to TDRs Commitments To Lend Additional Funds To TDRs Commitments To Lend Additional Funds To TDRs Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Interest Rate Swap Interest Rate Swap [Member] Cash surrender value of bank-owned life insurance Bank Owned Life Insurance Income from equity method investment Income from equity method investment Income (Loss) from Equity Method Investments Reclassification adjustment for realized (gains) losses on sale of AFS securities included in net income, net of tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Tabular List, Table Tabular List [Table Text Block] Basic Net Income Per Common Share: Earnings Per Share, Basic [Abstract] Schedule of Loan Portfolio Class by Risk Grade and Origination Year Loan Portfolio Credit Exposure [Table Text Block] Loan Portfolio Credit Exposure [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Non-accrual without an ALL Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Pledged Status [Axis] Pledged Status [Axis] Schedule of Carrying and Estimated Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Goodwill [Line Items] Goodwill [Line Items] Restricted shares withheld for taxes and related tax benefit Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Net income per common share, basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Cash dividends on preferred stock (in dollars per share) Preferred Stock, Dividends Per Share, Declared Mutual funds held in rabbi trusts Mutual Funds Held In Rabbi Trusts In Assets Mutual Funds Held In Rabbi Trusts In Assets All financing receivable, allowance for credit loss All Financing Receivable, Allowance For Credit Loss All Financing Receivable, Allowance For Credit Loss Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Dividends paid to preferred shareholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Financing Receivable, Nonaccrual [Table] Financing Receivable, Nonaccrual [Table] Consideration: Business Combination, Consideration Transferred [Abstract] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Federal funds purchased, and securities sold under repurchase agreements Business Combination, Recognized Liability Assumed, Federal Funds Purchased And Securities Sold Under Repurchase Agreements Business Combination, Recognized Liability Assumed, Federal Funds Purchased And Securities Sold Under Repurchase Agreements Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Issuances, net of taxes paid, under equity compensation plans Proceeds From Stock Options Exercised, Net Of Taxes Paid Proceeds From Stock Options Exercised, Net Of Taxes Paid 1 to 5 Years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Adjustment to Compensation, Amount Adjustment to Compensation Amount Total net gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets still held Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Schedule of Assets Measured at Fair Value on a Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Consolidation Consolidation, Policy [Policy Text Block] Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Total Charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Total non-interest revenue Business Combination, Pro Forma Information, Non-interest Income Business Combination, Pro Forma Information, Non-interest Income Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Loans, net Financing Receivable, after Allowance for Credit Loss Cash surrender value of bank-owned life insurance Business Combination, Recognized Asset Acquired, Cash Surrender Value Of Bank Owned Life Insurance Business Combination, Recognized Asset Acquired, Cash Surrender Value Of Bank Owned Life Insurance Total trading securities Debt Securities, Trading, and Equity Securities, FV-NI Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Consumer mortgages Consumer Loan [Member] Cash dividends paid on common stock Dividends, Common Stock, Cash Total equity Beginning balance Ending balance Equity interests Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent 5 to 10 Years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Insider Trading Policies and Procedures [Line Items] Expected allowance for credit losses Allowance for loan losses Business Combination, Recognized Asset Acquired, Allowance for Credit Losses Business Combination, Recognized Asset Acquired, Allowance for Credit Losses Common stock, shares authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Accrued interest receivable Financing Receivable, Accrued Interest, after Allowance for Credit Loss Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Total liabilities and equity Liabilities and Equity Fair Value, Measurements, Recurring Basis Fair Value, Recurring [Member] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover page. Cover [Abstract] Amounts reclassified from AOCI Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Federal funds sold, securities purchased under resale agreements, and interest earning deposits with banks Federal Funds Sold And Securities Purchased Under Agreements To Resell And Interest Earning Deposits With Banks Federal Funds Sold And Securities Purchased Under Agreements To Resell And Interest Earning Deposits With Banks Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Equity Method Investment [Table] Equity Method Investment [Table] Fair value less aggregate unpaid principal balance Fair Value, Option, Aggregate Differences, Long-Term Debt Instruments Unamortized holding gains on securities transferred to held to maturity, net of tax Unamortized Holding Gains (Losses) On Investment Securities Transferred To Held-To-Maturity, After Tax [Abstract] Unamortized Holding Gains (Losses) On Investment Securities Transferred To Held-To-Maturity, After Tax Accounting Policies [Abstract] Accounting Policies [Abstract] Net Carrying Value Finite-Lived Intangible Assets, Net Unrealized loss on securities Total, fair value Debt Securities, Available-for-Sale, Unrealized Loss Position More Than 10 Years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Full-time equivalent employees Entity Full-Time Equivalent Employees Entity Full-Time Equivalent Employees Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Term loans amortized cost basis by origination, current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] U.S. Government agency securities US Government Agencies Debt Securities [Member] Current Financing Receivables, Current And Less Than 30 Days Past Due, And Still Accruing [Member] Financing Receivables, Current and Less than 30 Days Past Due, and Still Accruing [Member] Net increase (decrease) in federal funds purchased, securities sold under repurchase agreements, and other short-term borrowings Increase (decrease) In Federal Funds Purchased, Securities Sold Under Repurchase Agreements, And Other Short-Term Borrowings Increase (decrease) In Federal Funds Purchased, Securities Sold Under Repurchase Agreements, And Other Short-Term Borrowings Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series B Series B Preferred Stock [Member] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accruing 90 Days or Greater Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities Liabilities [Abstract] Business Combination Business Combination [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Weighted Average Term Extension (in months) Financing Receivable, Modified, Weighted Average Term Increase from Modification Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Impact from the Merger Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Impact From Merger Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Impact From Merger Increase (decrease) in other liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Change in net unrealized gains (losses) on cash flow hedges arising during the period, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Term loans amortized cost basis by origination, two years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Wealth Customer Relationships Wealth Customer Relationships Wealth Customer Relationships [Member] Wealth Customer Relationships Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Net (purchases) redemptions of Federal Reserve Bank stock Payments for (Proceeds from) Federal Reserve Bank Stock Total interest expense Interest Expense, Operating Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Derivative, notional amount, percent of reference pool Derivative, Notional Amount, Percent Of Reference Pool Derivative, Notional Amount, Percent Of Reference Pool Within One Year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Net increase (decrease) in deposits Increase (Decrease) in Deposits Proceeds from maturities and principal collections of investment securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Financing Receivable, Nonaccrual [Line Items] Financing Receivable, Nonaccrual [Line Items] Class of Stock [Line Items] Class of Stock [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Investment securities Interest Income, Debt Securities, Operating Award Timing Method Award Timing Method [Text Block] Non-accrual with an ALL Financing Receivable, Excluding Accrued Interest, Nonaccrual Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Values of Investment Securities Unrealized Gain (Loss) on Investments [Table Text Block] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Award Type Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) Comprehensive Income (Loss) [Table Text Block] Legal Entity [Axis] Legal Entity [Axis] Schedule of Pro Forma Financial Information Business Combination, Pro Forma Information [Table Text Block] Total assets Assets Assets Investment, Name [Domain] Investment, Name [Domain] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year One Trading Symbol Trading Symbol Business Combinations Business Combination [Policy Text Block] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Bankers Healthcare Group, LLC Bankers Healthcare Group, LLC [Member] Bankers Healthcare Group, LLC External Credit Rating by Grouping [Domain] External Credit Rating by Grouping [Domain] Entity Address, City or Town Entity Address, City or Town Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Acquired finite-lived intangible assets, useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Allowance for Credit Losses (ACL) Credit Loss, Financial Instrument [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total preliminary consideration Business Combination, Consideration Transferred Financial assets Assets, Fair Value Disclosure [Abstract] 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Four Entity Emerging Growth Company Entity Emerging Growth Company Fair Value Total Debt Securities, Held-to-Maturity, Fair Value Other investments Other Investments Equity Awards Equity Awards [Member] Equity Awards Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Obligation to return cash collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Total assets acquired Business Combination, Recognized Asset Acquired, Asset Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] 5 to 10 Years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Recognized on derivatives Gain (Loss) Recognized in Consolidated Statements of Income Derivative, Gain (Loss) on Derivative, Net Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Macroeconomic factors supportable period Probability Of Default And Loss, Macroeconomic Factors, Supportable Period Probability Of Default And Loss, Macroeconomic Factors, Supportable Period Effect of dilutive outstanding equity-based awards (in shares) Potentially Dilutive Shares From Assumed Exercise Of Securities Or Other Contracts To Purchase Common Stock Potentially Dilutive Shares From Assumed Exercise Of Securities Or Other Contracts To Purchase Common Stock Total non-interest revenue Noninterest Income Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Asset Pledged as Collateral Asset Pledged as Collateral [Member] Newco Steel Newco Inc. [Member] Steel Newco Inc. Gross Unrealized Losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Allowance for credit loss, reasonable and supportable forecast period (in year) Financing Receivable, Allowance For Credit Loss, Reasonable And Supportable Forecast Period Financing Receivable, Allowance For Credit Loss, Reasonable And Supportable Forecast Period PEO PEO [Member] Non-interest expense: Noninterest Expense [Abstract] Cash and due from banks Cash and Due from Banks Schedule of Amortized Cost and Fair Value by Contractual Maturity of Investment Securities HTM and AFS Investments Classified by Contractual Maturity Date [Table Text Block] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Retail loan charge off (in days) Retail Loan Charge Off Delinquency status upon which a retail loan will be charged off in its entirety. Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Capital markets income Capital Markets Income Capital Markets Income FHLB advances and other borrowings Federal Home Loan Bank (FHLB) Advances And Other Borrowings Federal Home Loan Bank (FHLB) Advances And Other Borrowings Total loan sales and servicing Loan Sales And Servicing Revenue Loan Sales And Servicing Revenue Retained Earnings Retained Earnings [Member] 1 to 5 Years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Weighted Average Interest Rate Reduction Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income Statement [Abstract] Income Statement [Abstract] Total cash, cash equivalents, and restricted cash Cash, cash equivalents, and restricted cash, at beginning of period Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Total letters of credit and unfunded lending commitments Guarantee Obligations [Member] Derivative assets Derivative Asset Net interest income Business Combination, Pro Forma Information, Interest Income (Expense), Operating Business Combination, Pro Forma Information, Interest Income (Expense), Operating Income tax expense Income Tax Expense (Benefit) 12 months or longer, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer FHLB advances and other borrowings Federal Home Loan Bank Advances And Other Borrowings [Member] Federal Home Loan Bank Advances And Other Borrowings Other assets Other Assets Fair Value, Measurements, Nonrecurring Basis Fair Value, Nonrecurring [Member] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Allowance for credit loss, straight-line basis historical period (in year) Financing Receivable, Allowance For Credit Loss, Straight-Line Basis Historical Period Financing Receivable, Allowance For Credit Loss, Straight-Line Basis Historical Period Intangible assets Intangible Assets, Net (Excluding Goodwill) Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Financing Receivable, Modified [Table] Financing Receivable, Modified [Table] Other non-interest revenue Noninterest Income, Other Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Within One Year Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Notional amount Notional Amount Derivative, Notional Amount Business Combination, Consideration Transferred, Equity Interest, Type [Axis] Business Combination, Consideration Transferred, Equity Interest, Type [Axis] Letters of credit Standby And Commercial Letters Of Credit [Member] Standby And Commercial Letters Of Credit Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Revolving Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Goodwill acquired during the year (preliminary allocation) Goodwill, Acquired During Period Banking Banking Reporting [Member] Banking Reporting Other real estate Other Real Estate City Area Code City Area Code Schedule of Rollforward of Allowance for Loan Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Less: Preferred stock dividends Preferred Stock Dividends, Income Statement Impact Other non-interest revenue Noninterest Income, Other Operating Income Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Fair Value Hedges Fair Value Hedging [Member] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Equity Method Investments and Joint Ventures [Abstract] Proceeds from sales of investment securities available for sale Proceeds from Sale of Debt Securities, Available-for-Sale Investment securities available for sale Fair Value Total Total securities available for sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Other operating expense Non-Interest Expense, Other Operating Non-Interest Expense, Other Operating Cash Flow Hedges Cash Flow Hedging [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Net interest income Net interest income (expense) Interest Income (Expense), Operating Other liabilities Other Liabilities Goodwill Preliminary goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Total letters of credit and unfunded lending commitments Loss Contingency, Estimate of Possible Loss PEO Total Compensation Amount PEO Total Compensation Amount Derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset 2026 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Assets acquired: Business Combination, Recognized Asset Acquired, Asset [Abstract] Equity Components [Axis] Equity Components [Axis] Term loans amortized cost basis by origination, three years before current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Loans, net Business Combination, Recognized Asset Acquired, Loans, After Allowance For Credit Loss Business Combination, Recognized Asset Acquired, Loans, After Allowance For Credit Loss Conversion ratio (in shares) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Non-accrual Financial Asset, Nonaccrual [Member] Financial Asset, Nonaccrual Supplemental Disclosures: Supplemental Cash Flow Information [Abstract] Total commercial real estate Commercial Real Estate Commercial Real Estate [Member] Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Substandard Substandard [Member] Total interest income Interest and Dividend Income, Operating Special Mention Special Mention [Member] Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Collateral dependent loans Loans Receivable, Fair Value Disclosure Unpaid principal balance Fair Value Option, Aggregate Unpaid Principal Balance Of Mortgage Loans Held For Sale Fair value option, aggregate unpaid principal balance of mortgage loans held for sale. Deposits and securities sold under agreements to repurchase Deposits And Securities Sold Under Agreements To Repurchase Deposits And Securities Sold Under Agreements To Repurchase Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Dividends paid to common shareholders Payments of Ordinary Dividends, Common Stock Entities [Table] Entities [Table] Investments [Abstract] Investments [Abstract] Entity [Domain] Entity [Domain] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Synovus Financial Corp Synovus Financial Corp [Member] Synovus Financial Corp Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments and redemption of FHLB and other borrowings Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Core banking fees Core Banking Fee Income Core Banking Fee Income Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Carrying Value Reported Value Measurement [Member] Gross charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Merger-related expense Business Combination, Acquisition-Related Cost, Expense Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Financing Receivable, Modified [Line Items] Financing Receivable, Modified [Line Items] Home equity Home Equity Line of Credit [Member] Accruing 30-89 Days Past Due Financing Receivables, 30 To 89 Days Past Due [Member] Financing Receivables, 30 to 89 Days Past Due [Member] Equity [Abstract] Equity [Abstract] Purchased credit deteriorated loans Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date ACL to loans ratio (as percent) ACL To Loans Ratio ACL To Loans Ratio Accrued interest receivable on investment securities held to maturity Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss Total non-interest expense Noninterest Expense Schedule of Loan Commitments and Letters of Credit Loan Commitments And Letters of Credit [Table Text Block] Loan Commitments and Letters of Credit [Table Text Block] Investment securities gains (losses), net Debt and Equity Securities, Gain (Loss) Segment Reporting Segment Reporting Disclosure [Text Block] Schedule of Goodwill [Table] Goodwill [Table] Pinnacle Bank Pinnacle Bank [Member] Pinnacle Bank Derivatives Not Designated as Hedging Instruments Not Designated as Hedging Instruments Not Designated as Hedging Instrument [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] U.S. Treasury securities U.S. Treasury securities US Treasury Securities [Member] Payment Delay Payment Deferral [Member] Deposits Interest Expense, Deposits New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Non-interest revenue: Noninterest Income [Abstract] Doubtful Doubtful [Member] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Net change Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Deferred loan costs (fees) Financing Receivable, Unamortized Loan Cost (Fee) Total commercial and industrial Commercial & Industrial Commercial And Industrial [Member] Commercial and Industrial [Member] Amortization of intangibles Amortization of Intangible Assets Mortgage loans held for sale Fair value Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Net proceeds from settlement (purchases) of bank-owned life insurance policies Purchases Of Bank-Owned Life Insurance Policies, Net Of Settlements Purchases Of Bank-Owned Life Insurance Policies, Net Of Settlements Entity Central Index Key Entity Central Index Key PEO Name PEO Name Revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Non-interest-bearing deposits Noninterest-Bearing Deposit Liabilities Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Investment properties Investment Properties [Member] Investment Properties [Member] Segments [Axis] Segments [Axis] Schedule of Estimated Fair Value of Derivative Instruments included in the Consolidated Balance Sheets Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Decrease (increase) in other assets Increase (Decrease) in Prepaid Expense and Other Assets Mortgage loans held for sale Change In Mortgage Loans Held For Sale Included In Net Income Changes in the fair value of mortgage loans held for sale that were included in the consolidated statements of income during the reporting period. Exercise Price Award Exercise Price U.S Treasury Securities and State and Municipal Securities U.S Treasury Securities and State and Municipal Securities [Member] U.S Treasury Securities and State and Municipal Securities Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Schedule of Pre-Tax Effect of Changes in Fair Value from Derivative Instruments Not Designated as Hedging Instruments Effect Of Fair Value Hedges On The Consolidated Statements Of Income [Table Text Block] Schedule of Effect of Fair Value Hedges on the Consolidated Statements of Income Other Payment for (Proceeds from) Other Investing Activity Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Hedge accounting basis adjustment, assets Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Reclassification 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Authorized 110 million shares at Mar 31, 2026 and 10 million shares at Dec 31, 2025; 225,000 shares, liquidation preference $225 million, 22 million shares issued and outstanding at Mar 31, 2026, and 225,000 shares, liquidation preference $225 million, issued and outstanding at Dec 31, 2025. 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Legacy Pinnacle [Member] Legacy Pinnacle Allowance for loan losses Financing receivable, allowance for credit loss Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Within One Year Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Financial liabilities Financial Liabilities Fair Value Disclosure [Abstract] Basis of Presentation and Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Weighted average common shares outstanding, basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Equity Acceleration Expense Equity Acceleration Expense [Member] Equity Acceleration Expense Schedule of Basic and Diluted Net Income Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Securities held to maturity: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Total consumer Consumer Consumer Portfolio Segment [Member] Segment Reporting [Abstract] Unrealized gains (losses) on securities available for sale, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Entity Tax Identification Number Entity Tax Identification Number Allowance for credit loss, measurement input, estimated peak weighted average unemployment rate (in percent) Financing Receivable, Allowance For Credit Loss, Measurement Input, Estimated Weighted Average Unemployment Rate Financing Receivable, Allowance For 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Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Mortgage derivatives - interest rate lock commitments Interest Rate Lock Commitments [Member] Loans and Allowance for Loan Losses Financing Receivables [Text Block] Percentage of Total by Financing Class Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Merger-Related Costs [Domain] Merger-Related Costs [Domain] Merger-Related Costs [Domain] Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Discount (premium) included in amortized cost of investment securities HTM Debt Securities, Held-To-Maturity, Discount (Premium) Debt Securities, Held-To-Maturity, Discount (Premium) Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text 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Corporate Notes And Other Securities [Member] Corporate Notes And Other Securities Increase (decrease) in cash and cash equivalents including restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation