Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Contractual Balance Financing Receivable, Held-for-Sale Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Title of 12(b) Security Title of 12(b) Security Carrying Value Reported Value Measurement [Member] Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Beginning of year End of period Valuation Allowance for Impairment of Recognized Servicing Assets, Balance Non-interest Income (out-of-scope of Topic 606) Revenue Not from Contract with Customer, Excluding Interest Income Schedule of Assets and Liabilities Measured at Fair Value on Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Operating Leases Operating Leases [Abstract] Operating Leases Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] US Gov’t Sponsored Entities & Agencies US Gov’t Sponsored Entities & Agencies US Gov’t Sponsored Entities & Agencies US Government-sponsored Enterprises And Agencies Debt Securities [Member] US Government-sponsored Enterprises And Agencies Debt Securities Leases Lessee, Finance Leases [Text Block] Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted share grants net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures servicing rights Servicing Asset at Fair Value, Amount Measurement Frequency [Axis] Measurement Frequency [Axis] Threshold amount to individually classify loans by credit risk Financing Receivable, Individually Evaluated For Impairment, Threshold Amount Financing Receivable, Individually Evaluated For Impairment, Threshold Amount PCD Loans Financial Asset Acquired with Credit Deterioration [Member] Entity Common Stock. Shares Outstanding Entity Common Stock, Shares Outstanding Number of annual installments Share-Based Compensation Arrangement by Share-Based Payment Award, Number Of Installments Share-Based Compensation Arrangement by Share-Based Payment Award, Number Of Installments Premises, Furniture & Equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Doubtful Doubtful [Member] Leases [Abstract] Leases [Abstract] Additions Expensed Valuation Allowance for Impairment of Recognized Servicing Assets, Additions for Expenses Loans Total loans Total Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Total unrealized loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Number of options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Prior Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Common stock, stated value (in shares) Common Stock, Par or Stated Value Per Share Amount Reclassified From Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Intangible Assets Intangible Asset, Excluding Goodwill, after Accumulated Amortization Unvested restricted stock awards (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Vesting Period One Share-Based Payment Arrangement, Tranche One [Member] Current Period Gross Charge-Offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Net (Accretion) Amortization on Securities Accretion (Amortization) of Discounts and Premiums, Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Non-interest Income Business Acquisition, Pro Forma, Noninterest Income Business Acquisition, Pro Forma, Noninterest Income Accrued Interest Receivable and Other Assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest Receivable And Other Assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest Receivable And Other Assets Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] Finance Lease Cost: Lease, Cost [Abstract] Entity Address, City or Town Entity Address, City or Town Restricted stock granted during period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Stock in FHLB of Indianapolis and Other Restricted Stock, at Cost Federal Home Loan Bank Stock Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual [Domain] Title and Position [Domain] Disposals Servicing Asset at Fair Value, Disposals Awards granted cash credit entitlement (as a percent) Share Based Compensation, Restricted Stock and Restricted Stock, Cash Credit Entitlement Percentage Cash credit entitlements as a percent of grant. Schedule of Classifications Out of Accumulated Other Comprehensive Income (Loss) Classifications Out Of Accumulated Other Comprehensive Income [Table Text Block] Classifications Out Of Accumulated Other Comprehensive Income Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Year 4 Finance Lease, Liability, to be Paid, Rolling Year Four Significant Other Observable Inputs (Level 2) Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Commercial and Industrial Loans Commercial and Industrial Loans Commercial And Industrial [Member] Commercial And Industrial Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Greater Than 89 Days Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] FHLMC Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Schedule of Proceeds from the Sales of Securities Proceeds From Sales Of Available For Sale Securities [Table Text Block] Proceeds From Sales Of Available For Sale Securities Class of Treasury Stock [Table] Class of Treasury Stock [Table] Schedule of Segment Financial Information Segment Reporting [Table Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Total Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Schedule of Maturity of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Supplemental Non Cash Disclosures Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Allowance for Credit Losses Beginning Balance Total Ending Allowance Balance Allowance for credit losses Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Cash and Cash Equivalents Cash, Cash Equivalents, and Federal Funds Sold Heartland BancCorp Heartland BancCorp [Member] Heartland BancCorp Year 1 Finance Lease, Liability, to be Paid, Next Rolling 12 Months Basic Earnings per Share: Earnings Per Share, Basic [Abstract] Awards granted during period (as a percent) Schedule Of Share Based Compensation Restricted Stock and Restricted Stock Grant During Period Percentage Restricted stock as a percent of grant. Gross Losses on Sales Debt Securities, Available-for-Sale, Realized Loss Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Repurchased agreements Securities Sold under Agreements to Repurchase Finance Leases Finance Lease, Weighted Average Remaining Lease Term Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Per Share Data Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Servicing Asset at Amortized Cost Servicing Asset at Amortized Cost [Table Text Block] TOTAL LIABILITIES Liabilities Trading Symbol Trading Symbol Reductions Credited to Operations Valuation Allowance for Impairment of Recognized Servicing Assets, Deductions for Recoveries Measurement input, discount rate Measurement Input, Discount Rate [Member] Securities Available-for-Sale, at Fair Value (Amortized Cost $1,892,688 for June 30, 2026; Amortized Cost $1,865,732 for December 31, 2025; No Allowance for Credit Losses)  Fair Value  Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Allowance for Credit Losses [Roll Forward] Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Property and Equipment Expenditures Payments to Acquire Property, Plant, and Equipment Financing Receivable Allowance For Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Schedule of Fair Value of Total Consideration Transferred Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Purchase of Securities Available-for-Sale Payments to Acquire Debt Securities, Available-for-Sale Diluted Earnings per Share: Earnings Per Share, Diluted [Abstract] Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Depreciation and Amortization Depreciation, Depletion and Amortization, Nonproduction CASH FLOWS FROM OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Executive Officers Executive Officer [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Total Identifiable Net Assets Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) U.S. Treasury U.S. Treasury US Treasury Securities [Member] Award vesting (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Goodwill deductible for tax purposes Business Combination, Goodwill, Expected Tax Deductible, Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Potentially Dilutive Shares, Net (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Less Imputed Interest Finance Lease, Liability, Undiscounted Excess Amount Securities without single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Operating Cash Flows from Operating Leases Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five INTEREST INCOME Interest and Dividend Income, Operating [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Quoted Prices in Active Markets for Identical Assets (Level 1) Level 1 Fair Value, Inputs, Level 1 [Member] Range (Weighted Average) Loans Held-For-investment, Measurement Input Loans Held-For-investment, Measurement Input Non-interest Income (in-scope of Topic 606) Revenue from Contract with Customer, Excluding Assessed Tax, Including Other Operating Income Revenue from Contract with Customer, Excluding Assessed Tax, Including Other Operating Income Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] MBS/CMO MBS/CMO MBS/CMO Residential Mortgage-Backed Securities [Member] Vesting [Domain] Vesting [Domain] Plan Name [Domain] Plan Name [Domain] Reconciliation of Income before Income Taxes: Reconciliation of Income Before Income Taxes [Abstract] Reconciliation of Income Before Income Taxes Operating Lease Right-of-Use Assets Operating Lease, Right-of-Use Asset Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Cash for Stock Options, 401K Shares and Fractional Shares Payments To Acquire Businesses, Cash For Options And Fractional Shares Payments To Acquire Businesses, Cash For Options And Fractional Shares Expiration Date Trading Arrangement Expiration Date Mortgage Banking Mortgage Banking [Member] Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Operating Leases Lessee, Operating Lease, Liability, to be Paid, Rolling Maturity [Abstract] 2/1/2025 Acquired Heartland PCD Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Tax Effect Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Measurement input, default rate Measurement Input, Default Rate [Member] Derivative [Table] Derivative [Table] Other non-interest expense Other Noninterest Expense, Gross Other Noninterest Expense, Gross Interest-bearing Demand, Savings, and Money Market Accounts Interest-Bearing Deposit Liabilities Weighted Average Remaining Lease Term: Lease, Weighted Average Remaining Lease Term [Abstract] Lease, Weighted Average Remaining Lease Term Commercial Real Estate Loans Commercial Real Estate Loans Commercial Real Estate [Member] CASH FLOWS FROM INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Net Income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Segments [Domain] Segments [Domain] Interest Rate Swaps Interest Rate Swap [Member] Repurchase Agreements Accounted for as Secured Borrowings Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Consumer Loans Consumer Loans Consumer Loan [Member] Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Cash dividends Dividends, Common Stock, Cash Interchange Fee Income Interchange Fee Income Interchange Fee Income [Member] Interchange Fee Income TOTAL SHAREHOLDERS’ EQUITY Beginning balance Ending balance Equity, Attributable to Parent ASSETS Assets [Abstract] Shares issued for acquisition (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Schedule of Risk Category of Loans Financing Receivable Credit Quality Indicators [Table Text Block] Nonrecurring Fair Value, Nonrecurring [Member] Professional Fees Professional Fees Insider Trading Policies and Procedures [Line Items] Nonperforming Nonperforming Nonperforming Financial Instruments [Member] Gain Fair Value, Option, Loans Held as Assets, Aggregate Difference Loans Held-for-sale Loans Held-for-sale [Member] Loans Held-for-sale Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Carrying Amounts and Fair Values Of Financial Instruments [Table] Carrying Amounts and Fair Values Of Financial Instruments [Table] Carrying Amounts and Fair Values of Financial Instruments [Table] Servicing asset measurement input Servicing Asset, Measurement Input Number of operating segments Number of Operating Segments Proceeds from sale of short-term investments Proceeds from Sale of Short-Term Investments Anti-dilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Interest Income (Expense), after Provision for Loan Loss Additional Paid-in Capital Additional Paid in Capital, Common Stock Equity [Abstract] Equity [Abstract] 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] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Aggregate Fair Value, Contractual Balance and Gain (Loss) of Loans Held-for-Sale Fair Value Disclosure, Financing Receivable, Held-For-sale [Table Text Block] Fair Value Disclosure, Financing Receivable, Held-For-sale Securities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Non-accrual with no allowance for credit loss Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Total Lease Payments Finance Lease, Liability, to be Paid Restricted Stock Restricted Stock [Member] Loans Originated for Sale Payment for Origination and Purchase, Loan, Held-for-Sale Accumulated Other Comprehensive Income (Loss) Total AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Income Taxes on Net Gains (Losses) Income Tax Gross Gains The gross gains that make up a cumulative-effect adjustment on Income tax. Dividends Paid Payments of Dividends Change in Valuation Allowance Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs Performing Performing Performing Financial Instruments [Member] Equity Instruments Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] TOTAL ASSETS Total assets Assets Assets TOTAL INTEREST EXPENSE Interest Expense, Operating Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Operating segments Operating Segments [Member] Reclassification Adjustment for Losses (Gains) Included in Net Income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Investments Original amount in non-controlling investment security in a single banking organization Equity Securities without Readily Determinable Fair Value, Amount Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Equity Plans and Equity Based Compensation Share-Based Payment Arrangement [Text Block] Securities without single maturity Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Other Comprehensive Income (Loss) Before Reclassification OCI, before Reclassifications, Net of Tax, Attributable to Parent Occupancy, Furniture and Equipment Expense Occupancy, Net PEO PEO [Member] Non-interest-bearing Demand Deposits Noninterest-Bearing Deposit Liabilities Schedule of Supplemental Balance Sheet Information Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Retained Earnings Retained Earnings [Member] Fair Value Fair Value Measurement, Policy [Policy Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] End of period shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Schedule of Carrying Amounts and Estimated Fair Values of Company's Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Diluted earnings per share (in dollars per share) Diluted Earnings per Share (in dollars per share) Earnings Per Share, Diluted Other operating income, safe deposit box rentals and other non-interest related fees Other Operating Income, Safe Deposit Box Rentals And Other Non-Interest Related Fees [Member] Other Operating Income, Safe Deposit Box Rentals And Other Non-Interest Related Fees Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] FDIC Premiums Federal Deposit Insurance Corporation Premium Expense Loans, Net Financing Receivable, Excluding Accrued Interest And Impaired, After Allowance For Credit Losses Financing Receivable, Excluding Accrued Interest And Impaired, After Allowance For Credit Losses Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Earnings per share, basic (in dollars per share) Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Basic Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Additions Servicing Asset at Amortized Cost, Additions Other Real Estate Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Real Estate Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Real Estate Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Non-interest income Non-interest Income (in-scope of Topic 606) Revenue from Contract with Customer, Excluding Assessed Tax Year 2 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two Financial Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Finance Leases Finance Lease, Liability, to be Paid, Rolling Maturity [Abstract] Title of Individual [Axis] Title and Position [Axis] Escrow deposit Escrow Deposit Year 2 Finance Lease, Liability, to be Paid, Rolling Year Two Net Interest Income Business Acquisition, Pro Forma Interest Income (Expense) Business Acquisition, Pro Forma Interest Income (Expense) Schedule of Maturity of Finance Lease Liabilities Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Day 2 CECL Provision - Heartland Financing Receivable, Excluding Accrued Interest, Transfer in, Allowance for Credit Loss, Expense Business Combinations Business Combination [Text Block] Collateral Held [Axis] Collateral Held [Axis] Additional impairment on equity securities recognized through earnings Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Equity Securities Equity Securities [Member] Revolving Loans Amortized Cost Basis Revolving Loans Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Revolving Schedule of Allowance for Credit Losses for Loans Financing Receivable, Allowance for Credit Loss [Table Text Block] End of period shares issued (in shares) Common Stock, Shares, Issued 12 Months or more, unrealized loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Loss on Sales of Other Real Estate and Repossessed Assets Gains (Losses) on Sales of Other Real Estate 2009 Long-Term Equity Incentive Plan Long-Term Equity Incentive Plan 2009 [Member] Long-Term Equity Incentive Plan 2009 NON-INTEREST EXPENSE Noninterest Expense [Abstract] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Derivative instruments not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Advertising and Promotion Marketing and Advertising Expense Provision (Benefit) for Credit Loss Expense Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Adjusted Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Adjusted Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Intangible assets Intangible Assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Compensation period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Included in Other Liabilities: Other Liabilities [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Total Collateral Pledged [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Interest on Deposits Interest Expense, Domestic Deposits Core Banking Retail Banking [Member] Retail Banking [Member] Less: Unearned Income Less: Unearned Income Financing Receivable, Unamortized Loan Cost (Fee) and Purchase Premium (Discount) Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Less than 12 months, unrealized loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Agricultural Loans Agricultural Loans Agricultural [Member] Agricultural [Member] Total Consolidated Revenue Revenues Included in Other Assets: Other Assets [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Fair value of non-impaired loans and customers receivables acquired Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value Amortization of Right-of-Use Assets Finance Lease, Right-of-Use Asset, Amortization Year 3 Finance Lease, Liability, to be Paid, Rolling Year Three Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Interest on Lease Liabilities Finance Lease, Interest Expense Fair Value Fair Value Disclosures [Text Block] Deposits - Non-interest Bearing Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noninterest-Bearing Deposit Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noninterest-Bearing Deposit Liabilities Significant Unobservable  Inputs (Level 3) Level 3 Fair Value, Inputs, Level 3 [Member] Cash and Short-term Investments Cash, Cash Equivalents, and Short-Term Investments 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Interest on Deposits Interest Expense, Domestic Deposits, Gross Interest Expense, Domestic Deposits, Gross 2022 Repurchase Plan Share Repurchase Program 2022 [Member] Share Repurchase Program 2022 Finance Leases Finance Leases [Abstract] Finance Leases NON-INTEREST INCOME Noninterest Income [Abstract] Cash and Cash Equivalents at Beginning of Year Cash and Cash Equivalents at End of Period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Schedule or Collateral-dependent Loans by Class Schedule Of Financing Receivable By Collateral Type [Table Text Block] Schedule Of Financing Receivable By Collateral Type Non-NEOs Non-NEOs [Member] Maturity Overnight Maturity Overnight [Member] Cash paid for acquisition Payments to Acquire Businesses, Gross Loans Credit Loss, Financial Instrument [Policy Text Block] Leases Lessee, Operating Leases [Text Block] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fair Value Assets and Liabilities Measured On Recurring Basis [Table] Fair Value Assets and Liabilities Measured On Recurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring Basis [Table] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Collateralized Mortgage Backed Securities Collateralized Mortgage-Backed Securities [Member] Non-recurring merger costs excluded from pro forma information Noncash Merger Related Costs Statistical Measurement [Axis] Statistical Measurement [Axis] FHLB Advances and Other Borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Advances From Federal Home Loan Banks And Other Borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Advances From Federal Home Loan Banks And Other Borrowings Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Year 5 Finance Lease, Liability, to be Paid, Rolling Year Five Real Estate Real Estate [Member] Securities, available-for-sale, at fair value Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Retained Earnings Retained Earnings (Accumulated Deficit) Retail: Consumer Portfolio Segment [Member] Product and Service [Axis] Product and Service [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Year 3 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three Common Stock Common Stock Common Stock [Member] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Operating Lease Cost Operating Lease, Cost Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Wealth Management Services Wealth Management Services [Member] Wealth Management Services Derivative Contract [Domain] Derivative Contract [Domain] Total Past Due Financial Asset, Past Due [Member] Cash Paid During the Period for Cash Paid During Period For [Abstract] Cash Paid During Period For [Abstract] TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity Stock Options Share-Based Payment Arrangement, Option [Member] Servicing Asset at Fair Value, Activity [Table] Servicing Asset at Fair Value, Activity [Table] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Schedule of Fair Value of Interest Rate Swaps Included in Consolidated Balance Sheets Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Wire Transfer Fees Wire Transfer Fees [Member] Wire Transfer Fees Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Schedule of Securities with Unrealized Losses Unrealized Gain (Loss) on Investments [Table Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Adjustment for physical condition of comparable properties sold Valuation, Market Approach [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Common stock, percentage of Company's outstanding shares authorized for repurchase (as a percent) Stock Repurchase Program, Percentage Of Company's Outstanding Shares Authorized For Repurchase Stock Repurchase Program, Percentage Of Company's Outstanding Shares Authorized For Repurchase Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity 60-89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Fair value assets Fair Value Assets, Fair Value Disclosure Proceeds from Sales of Other Real Estate Proceeds from Sale of Foreclosed Assets Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward] Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward] Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Interest and Fees on Loans Interest and Fees on Loans Interest and Fee Income, Financing Receivable Additional Paid-in Capital Additional Paid-in Capital [Member] Credit Quality Indicators Financing Receivable [Policy Text Block] Intangible Asset, Indefinite-Lived, Class [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Equipment Equipment [Member] Loans Made to Customers, Net of Payments Received Payments for (Proceeds from) Other Loans and Leases Accrued Interest Receivable Interest Receivable Name Trading Arrangement, Individual Name Year 1 Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months Direct Write-downs Valuation Allowance for Impairment of Recognized Servicing Assets, Deductions for Aggregate Write-Downs Net Gains on Securities Net Gains (Losses) on Securities Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Increase in Cash Surrender Value of Company Owned Life Insurance Life Insurance, Corporate or Bank Owned, Change in Value Operating Leases Operating Lease, Weighted Average Remaining Lease Term Thereafter Finance Lease, Liability, to be Paid, after Rolling Year Five Non-PEO NEO Non-PEO NEO [Member] Interest on Federal Funds Sold and Other Short-term Investments Interest Income Federal Funds Sold and Domestic Deposits Interest income on federal funds sold. Federal funds sold represent the excess federal funds held by one commercial bank which it lends to another commercial bank, usually at an agreed-upon (federal funds) rate of interest. Such loans generally are of short-duration (overnight). Interest earned on deposits in United States money market accounts and other United States interest earning accounts. 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Determination Date [Axis] Interest rate swaps, fair value Derivative Assets Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Recognized Amounts of Identifiable Assets Acquired and Liabilities Assumed: Business Combination, Recognized Liability Assumed, Liability [Abstract] Leases Lessee, Leases [Policy Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Direct acquisition costs Business Combination, Acquisition-Related Cost, Expense Stock compensation expense, net of tax Net of Tax Share-Based Payment Arrangement, Expense, after Tax Total Deposits Demand, Savings, and Money Market Deposits Deposits Deposits Weighted Average 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Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Interest-bearing Time Deposits with Banks Interest Bearing Time Deposits with Banks Interest-Bearing Deposits in Banks and Other Financial Institutions Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Interest income on non-accrual loans Financing Receivable, Nonaccrual, Interest Income TOTAL NON-INTEREST INCOME Noninterest Income Income Tax Expense Business Acquisition, Pro Forma Income Tax Expense (Benefit) Business Acquisition, Pro Forma Income Tax Expense (Benefit) Interest-bearing Time Deposits with Banks Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest-Bearing Deposits With Banks And Other Financial Institutions Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest-Bearing Deposits With Banks And 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three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Change in Assets and Liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net Cash from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Stock Repurchase Plan Equity [Text Block] Security Exchange Name Security Exchange Name Credit Loss Status [Domain] Credit Loss Status [Domain] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Accrued Interest Receivable and Other Assets Interest Receivable and Other Assets Number of shares authorized for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of 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Activity Financing Receivable, Amortized Cost In Credit Card Loans Based On Payment Activity [Table Text Block] Financing Receivable, Amortized Cost In Credit Card Loans Based On Payment Activity 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] Derivative Liabilities Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Schedule of Fair Value Assets and Liabilities Measured on Nonrecurring Basis Valuation Techniques Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] FHLB Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) Total Reclassifications Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Estimated contractual cash flows of purchased financial asset with credit deterioration Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible Postretirement Benefit Items Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Residential Mortgage Loans Residential Mortgage Loans Residential Mortgage [Member] Asset Class [Domain] Asset Class [Domain] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted Weighted Average Shares Outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Underlying Security Market Price Change Underlying Security Market Price Change, Percent Premises, Furniture and Equipment, Net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Less Imputed Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Short-term Borrowings Short-Term Debt Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Change in Accounting Method Financing Receivable, Excluding Accrued Interest, Change in Method, Credit Loss Expense (Reversal) Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Intangible Asset, Indefinite-Lived, Class [Domain] Intangible Asset, Indefinite-Lived, Class [Domain] Total Lease Payments Lessee, Operating Lease, Liability, to be Paid Transfers and Servicing [Abstract] Transfers and Servicing [Abstract] Interest rate swaps, notional amount Derivative Asset, Notional Amount Proceeds from Sales of Loans Held-for-Sale Proceeds from Sale, Loan, Held-for-Sale Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Collateral Held [Domain] Collateral Held [Domain] All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Interest Rate Lock Commitments Interest Rate Lock Commitments [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Loans Past Due Over 89 Days Still Accruing Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing Data Processing Fees Information Technology and Data Processing Schedule of Computations of Basic Earnings per Share and Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Information Segment Reporting [Text Block] Proceeds from Maturities, Calls, and Redemptions of Securities Available-for-Sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Minimum Minimum [Member] Servicing Assets at Fair Value [Line Items] Servicing Assets at Fair Value [Line Items] Investment Type [Axis] Investment Type [Axis] Number of non-controlling investments in a single banking organization Non-Controlling Investment In A Single Banking Organization, Number Non-Controlling Investment In A Single Banking Organization, Number Fair value of securities held Securities Investments, Fair Value Disclosure Amortized to Expense Servicing Asset at Amortized Cost, Amortization Other Other Collateral [Member] Other Collateral Schedule of Non-interest Income, Segregated by Revenue Stream Disaggregation of Revenue [Table Text Block] LIABILITIES Liabilities [Abstract] Excluding Heartland Acquisition Excluding Heartland Acquisition [Member] Excluding Heartland Acquisition Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] FNMA Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Purchase credit deteriorated loans Financing Receivable, Accrued Interest, after Allowance for Credit Loss FHLB Advances and Other Borrowings Advance from Federal Home Loan Bank Business Combination [Line Items] Business Combination [Line Items] Other Operating Income Noninterest Income, Other Operating Income Proceeds from Redemption of Federal Home Loan Bank Stock Proceeds from Sale of Federal Home Loan Bank Stock Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Gross Gains on Sales Debt Securities, Available-for-Sale, Realized Gain Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Exercise Price Award Exercise Price Restricted Share Grants Net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Recurring Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Other Changes Servicing Asset at Fair Value, Other Changes in Fair Value Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Obligations of State and Political Subdivisions Obligations of State and Political Subdivisions Obligations of State and Political Subdivisions US States and Political Subdivisions Debt Securities [Member] Restricted Stock Expense Restricted Stock or Unit Expense Special Mention Special Mention [Member] Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Proceeds from Sales of Securities Available-for-Sale Proceeds from Sales Proceeds from Sale of Debt Securities, Available-for-Sale Leases Leases Leases [Member] Leases Accrued Interest Payable Interest Payable Repayments of Long-term Debt Repayments of Long-Term Debt Year 5 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] (Losses)/gains from changes in fair value included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Adoption Date Trading Arrangement Adoption Date 2019 LTI Plan Long-Term Equity Incentive Plan 2019 [Member] Long-Term Equity Incentive Plan 2019 Schedule of Residential, Home Equity and Consumer Loans Based on Payment Activity Financing Receivable, Amortized Cost In Residential And Consumer Loans Based On Payment Activity [Table Text Block] Financing Receivable, Amortized Cost In Residential And Consumer Loans Based On Payment Activity Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating Lease Liabilities Total Operating Lease, Liability Other Borrowings Total Finance Lease, Liability Outstanding stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Commercial: Commercial Portfolio Segment [Member] Common stock, authorized shares repurchase (up to) (in shares) Share Repurchase Program, Authorized, Number of Shares Business Combination [Domain] Business Combination [Domain] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Federal Funds Sold and Other Short-term Investments Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Funds Sold And Other Short-term Investments Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Funds Sold And Other Short-Term Investments Weighted Average Weighted Average [Member] Purchases Financing Receivable, Excluding Accrued Interest, Purchase All Adjustments to Compensation All Adjustments to Compensation [Member] Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Core Deposits Core Deposits [Member] Business Combination [Axis] Business Combination [Axis] Net Cash from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accounts Receivable Accounts Receivable [Member] Mortgage loan portfolios serviced for: Loan Portfolio Expense Substandard Substandard [Member] Income Statement [Abstract] Income Statement [Abstract] SHAREHOLDERS’ EQUITY Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Elimination of Intercompany Revenues Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Earnings per share, diluted (in dollars per share) Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Diluted City Area Code City Area Code Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] 2/1/2025 Acquired Heartland Loan Servicing Rights Servicing Asset At Fair Value Acquired Heartland Loan Servicing Rights In Fair Value Servicing Asset At Fair Value Acquired Heartland Loan Servicing Rights In Fair Value Collateral Dependent Loans Impaired Loans [Member] Impaired Loans [Member] Interest and Dividends on Securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] TOTAL INTEREST INCOME Interest and Dividend Income, Operating Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Interest Receivable and Other Assets Increase (Decrease) in Other Operating Assets Change in Deposits Increase (Decrease) in Deposits Stock compensation expense Cash Entitlement Expense Share-Based Payment Arrangement, Expense Loans, Net Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Financing Receivable, Net Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Financing Receivable, Net Measurement Basis [Axis] Measurement Basis [Axis] Proceeds from Sale of Loans Held for Investment Proceeds from Sale, Loan, Held-for-Investment Year 4 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Unrealized Holding Gain (Loss) Arising During the Period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Cash Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Unrealized Gains and Losses on Available-for-Sale Securities Amount Reclassified From Accumulated Other Comprehensive Income (Loss) AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Credit Cards Credit Cards Credit Card Receivable [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net Cash from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Synergies and Cost Savings Synergies And Cost Savings [Member] Synergies And Cost Savings Number of banking offices Number Of Banking Offices Number Of Banking Offices Number of loans modified as troubled debt restructurings Financing Receivable, Loan Modifications, Number of Contracts Financing Receivable, Loan Modifications, Number of Contracts Schedule of Unaudited Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Adjustments to Reconcile Net Income to Net Cash from Operating Activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Federal Funds Sold and Other Short-term Investments Federal Funds Sold And Interest Bearing Deposits In Banks And Other Financial Institutions The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements. For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. Cash paid for amounts in the Measurement of Lease Liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee Company Owned Life Insurance Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Bank Owned Life Insurance Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Bank Owned Life Insurance CASH FLOWS FROM FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Mortgage Servicing Rights Mortgage Servicing Rights [Member] Mortgage Servicing Rights Financial Instruments [Domain] Financial Instruments [Domain] Income Before Income Taxes Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Before Income Taxes Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Before Income Taxes Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Underlying Securities Award Underlying Securities Amount Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Revenue Recognition Revenue from Contract with Customer [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Acquisition of Heartland BancCorp (in shares) Stock Issued During Period, Shares, Acquisitions Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Number of shares reserved for new grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Segment Reporting [Table] Segment Reporting [Table] Home Equity Loans Home Equity Loans Home Equity Loan [Member] Schedule of Components of Lease Expense, Weighted Average Remaining Lease Term, Discount Rates and Supplemental Cash Flow Information Lease, Cost [Table Text Block] All Trading Arrangements All Trading Arrangements [Member] Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Provision for Credit Losses Provision for Credit Losses Provision (Benefit) for Credit Loss Expense Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] Unrealized Gains (Losses) on Securities: Debt Securities, Available-for-Sale, Unrealized Gain (Loss) [Abstract] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Common stock, shares purchased (in shares) Stock Repurchased During Period, Shares 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] Cash dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Change in Short-term Borrowings Proceeds from (Repayments of) Short-Term Debt Provision for Credit Losses Business Acquisition, Pro Forma, Financing Receivable, Credit Loss, Expense (Reversal) Business Acquisition, Pro Forma, Financing Receivable, Credit Loss, Expense (Reversal) Schedule of Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] ATM Fees ATM Fees [Member] ATM Fees Non-taxable Interest Income, Securities, Operating, Tax Exempt Equity Components [Axis] Equity Components [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Entity Interactive Data Current Entity Interactive Data Current Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Entity Small Business Entity Small Business COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Weighted average useful live of acquired intangibles (in years) Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period NET INTEREST INCOME Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Proceeds from Sales of Land and Buildings Proceeds From Sale Of Land Held For Use And Building Proceeds From Sale Of Land Held For Use And Building Document Type Document Type Cash Consideration Payments to Acquire Businesses, Net of Cash Acquired 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] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Securities, available-for-sale, at amortized cost Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Carrying value of securities pledged to secure repurchase agreements, public and trust deposits and other by law Security Sold under Agreement to Repurchase and Deposit Received for Security Loaned Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Advances in Long-term Debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Income before Income Taxes Segment Profit (Loss) Before Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Beginning of year End of period Servicing Asset At Carrying Value, Amount Servicing Asset At Carrying Value, Amount Interest Rate Swap Fair Value Adjustment Interest Rate Swap Fair Value Activity Interest Rate Swap Fair Value Activity Executive Category: Executive Category [Axis] Other Comprehensive Income: OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment and Tax [Abstract] Stock in FHLB and Other Restricted Stock, at Cost Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Stock And Other Restricted Stock, At Cost Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Stock And Other Restricted Stock, At Cost Less: Noncash Or Part Noncash Items [Abstract] Noncash or Part Noncash Items [Abstract] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Net Gains on Sales of Loans Gain on Sale of Loans, Net Net Gains on Sales of Loans Gain (Loss) on Sales of Loans, Net Carrying Amounts and Fair Values of Financial Instruments [Line Items] Carrying Amounts and Fair Values Of Financial Instruments [Line Items] Carrying Amounts and Fair Values of Financial Instruments [Line Items] Accrued Interest Payable and Other Liabilities Accounts Payable and Accrued Liabilities PEO Name PEO Name Non-interest Expense Business Acquisition, Pro Forma Noninterest Expense Business Acquisition, Pro Forma Noninterest Expense Financial Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Income Taxes Income Tax Paid, before Refund Received Acquisition of Heartland BancCorp Cash Acquired from Acquisition Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Cash and Due from Banks Cash and Due from Banks Schedule of Aging of Past Due Loans Financing Receivable, Past Due [Table Text Block] Loans Not Past Due Financial Asset, Not Past Due [Member] Credit Loss Status [Axis] Credit Loss Status [Axis] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Company Owned Life Insurance Bank Owned Life Insurance Income Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Issuance of Common Stock for: Shares Granted or Issued, Share-Based Payment Arrangement [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Measurement Frequency [Domain] Measurement Frequency [Domain] Equity Based Compensation Share-Based Payment Arrangement, Noncash Expense INTEREST EXPENSE Interest Expense, Operating and Nonoperating [Abstract] Salaries and Employee Benefits Salaries and Employee Benefits Labor and Related Expense Total Lease Cost Lease, Cost Employee Stock Employee Stock [Member] Basic earnings per share (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Insider Trading Arrangements [Line Items] Short-term Lease Cost Short-Term Lease, Cost Net of Tax Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Company Owned Life Insurance Bank Owned Life Insurance 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] Service Charges on Deposit Accounts Service Charges on Deposit Accounts Service Charge on Deposit Accounts [Member] Service Charge on Deposit Accounts Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recoveries Collected Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Wealth Management Fees Wealth Management Fees Wealth Management Fees Wealth Management Fees [Member] Wealth Management Fees Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Taxable Interest Income Securities Taxable and Dividend Income Operating Interest income derived from investment securities which are subject to federal income taxes. Earned dividend income on equity securities that are part of the trading and investment portfolios owned by the entity. Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Sales Financing Receivable, Excluding Accrued Interest, Sale and Reclassification to Held-for-Sale Equity Awards Adjustments Equity Awards Adjustments [Member] Measurement input, prepayment rate Measurement Input, Prepayment Rate [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Interest Payable and Other Liabilities Increase (Decrease) in Other Operating Liabilities Revolving Loans Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Pass Pass [Member] Plan Name [Axis] Plan Name [Axis] Schedule of Loans Classifications Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Expense Recorded for Restricted Stock and Cash Entitlements Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Derivatives Derivatives and Fair Value [Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Accrued Interest Payable and Other Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Interest Payable And Other Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Interest Payable And Other Liabilities Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] Servicing Asset [Abstract] Operating Cash Flows from Finance Leases Finance Lease, Interest Payment on Liability Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Provision for Credit Losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), And Transfers In And Change In Method Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), And Transfers In And Change In Method Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Other Real Estate Real Estate Acquired Through Foreclosure Schedule of Effect of Derivative Instruments Consolidated Statements of Income Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Fair Value of Total Consideration Transferred Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Total fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Director Director [Member] Basis of Presentation and Market Conditions Basis of Accounting [Text Block] Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Share price (in dollars per share) Business Combination, Price Per Share Total Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Entity Address, Address Line One Entity Address, Address Line One Income Tax Expense Income Tax Expense Income Tax Expense (Benefit) Loans Charged-off Total Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Statement [Table] Statement [Table] Vesting Period Two Share-Based Payment Arrangement, Tranche Two [Member] Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Schedule of Non-Accrual and Past Due Loans Financing Receivable, Nonaccrual [Table Text Block] Deposits - Interest Bearing Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest-Bearing Deposit Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Interest-Bearing Deposit Liabilities Other Other Operating Income [Member] Other Operating Income Purchase price (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price Percentage, Offering Date Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price Percentage, Offering Date Loans Held-for-Sale, at Fair Value Loans Held-for-Sale Aggregate Fair Value Loan, Held-for-Sale, Fair Value Disclosure Gain on Disposition of Premises and Equipment Gain (Loss) On Disposition Of Building And Equipment Gain (Loss) On Disposition Of Building And Equipment Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]