$BUSE
First Busey Corp Stock $buse

$buse Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000031448924000054 Filed on February 23, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$125.7M		$479.4M
YoY Change	13.17%		33.16%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$6.550M		$23.71M
YoY Change	16.13%		9.52%
% of Gross Profit
Depreciation & Amortization	$2.378M	$5.545M	$9.488M
YoY Change	0.3%	-7.97%	-9.64%
% of Gross Profit
Operating Expenses	$6.550M		$23.71M
YoY Change	16.13%		9.52%
Operating Profit
YoY Change
Interest Expense	$49.97M		$159.9M
YoY Change	97.9%		337.57%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$34.96M	$33.22M	$153.9M
YoY Change	-24.57%	-27.31%	-4.84%
Income Tax	$8.735M	$7.466M	$31.34M
% Of Pretax Income	24.99%	22.48%	20.36%
Net Earnings	$26.23M	$25.75M	$122.6M
YoY Change	-28.71%	-25.12%	-4.48%
Net Earnings / Revenue	20.86%		25.57%
Basic Earnings Per Share	$0.47		$2.21
Diluted Earnings Per Share	$0.46	$0.46	$2.18
COMMON SHARES
Basic Shares Outstanding	55.25M shares	55.26M shares	55.43M shares
Diluted Shares Outstanding	56.41M shares		56.26M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$591.1M	$719.6M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$132.1M	$133.6M	$133.6M
YoY Change	4.41%	-4.11%	-4.11%
Goodwill	$317.9M	$317.9M
YoY Change	0.0%	0.0%
Intangibles	$33.58M	$35.99M
YoY Change	-23.14%	-22.47%
Long-Term Investments	$120.9M	$127.1M
YoY Change	-4.87%	0.57%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$11.89B	$12.28B	$12.28B
YoY Change	-3.7%	-0.43%	-0.43%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$10.90M	$11.31M	$11.31M
YoY Change	-12.94%	-12.98%	-12.98%
Deferred Revenue
YoY Change
Short-Term Debt	$147.2M	$199.4M	$199.4M
YoY Change	-76.1%	-43.2%	-65.67%
Long-Term Debt Due		$12.00M	$12.00M
YoY Change
Total Short-Term Liabilities	$158.1M	$210.7M	$210.7M
YoY Change	-81.17%	1521.42%	1521.42%
LONG-TERM LIABILITIES
Long-Term Debt	$295.1M	$312.9M	$312.9M
YoY Change	-8.08%	-3.39%	-3.39%
Other Long-Term Liabilities	$191.4M	$196.7M	$196.7M
YoY Change	3.82%	-2.49%	-2.49%
Total Long-Term Liabilities	$486.5M	$509.6M	$509.6M
YoY Change	-3.74%	-3.04%	-3.04%
TOTAL LIABILITIES
Total Short-Term Liabilities	$158.1M	$210.7M	$210.7M
Total Long-Term Liabilities	$486.5M	$509.6M	$509.6M
Total Liabilities	$10.60B	$11.01B	$11.01B
YoY Change	-4.86%	-1.6%	-1.6%
SHAREHOLDERS EQUITY
Retained Earnings	$248.4M	$237.2M
YoY Change	29.43%	40.55%
Common Stock	$58.00K	$58.00K
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$68.63M	$70.07M
YoY Change	-2.03%	-0.69%
Treasury Stock Shares
Shareholders Equity	$1.283B	$1.272B	$1.272B
YoY Change
Total Liabilities & Shareholders Equity	$11.89B	$12.28B	$12.28B
YoY Change	-3.7%	-0.43%	-0.43%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$26.23M	$25.75M	$122.6M
YoY Change	-28.71%	-25.12%	-4.48%
Depreciation, Depletion And Amortization	$2.378M	$5.545M	$9.488M
YoY Change	0.3%	-7.97%	-9.64%
Cash From Operating Activities	$37.35M	$46.06M	$173.4M
YoY Change	-17.54%	-3.58%	4.59%
INVESTING ACTIVITIES
Capital Expenditures	$1.365M	$2.783M	$9.533M
YoY Change	-42.65%	183.11%	91.08%
Acquisitions			$0.00
YoY Change
Other Investing Activities	$250.3M	$394.5M	$560.5M
YoY Change	439.32%	704.21%	-296.08%
Cash From Investing Activities	$249.0M	$391.7M	$551.0M
YoY Change	465.37%	714.86%	-289.44%
FINANCING ACTIVITIES
Cash Dividend Paid	$13.26M		$53.08M
YoY Change	-0.07%		4.35%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$414.8M	-56.11M	-$232.0M
YoY Change	913.59%	-74.0%	-52.06%
NET CHANGE
Cash From Operating Activities	$37.35M	46.06M	$173.4M
Cash From Investing Activities	$249.0M	391.7M	$551.0M
Cash From Financing Activities	-$414.8M	-56.11M	-$232.0M
Net Change In Cash	-$128.5M	381.7M	$492.4M
YoY Change	-365.49%	-418.09%	-180.87%
FREE CASH FLOW
Cash From Operating Activities	$37.35M	$46.06M	$173.4M
Capital Expenditures	$1.365M	$2.783M	$9.533M
Free Cash Flow	$35.99M	$43.28M	$163.9M
YoY Change	-16.15%	-7.5%	1.9%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	us-gaap	Financing Interest Expense FinancingInterestExpense	637000	usd
CY2022	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	3029000	usd
CY2021	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	2840000	usd
CY2021	us-gaap	Interest Expense InterestExpense	28102000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000314489
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2022Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2022Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2021	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#GainLossOnSaleOfMortgageLoans
CY2022	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#GainLossOnSaleOfMortgageLoans
CY2023	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#GainLossOnSaleOfMortgageLoans
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	0-15950
CY2023	dei	Entity Registrant Name EntityRegistrantName	FIRST BUSEY CORPORATION
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NV
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	37-1078406
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	100 W. University Ave.
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Champaign
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	61820
CY2023	dei	City Area Code CityAreaCode	217
CY2023	dei	Local Phone Number LocalPhoneNumber	365-4544
CY2023	dei	Security12b Title Security12bTitle	Common Stock ($0.001 par value)
CY2023	dei	Trading Symbol TradingSymbol	BUSE
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	1000000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	55247094	shares
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Name AuditorName	RSM US LLP
CY2023	dei	Auditor Location AuditorLocation	Champaign, Illinois
CY2023Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	134680000	usd
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	117513000	usd
CY2023Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	584901000	usd
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	109651000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	719581000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	227164000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2087571000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2461393000	usd
CY2023Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	872628000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	918312000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	9812000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	11535000	usd
CY2023Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	2379000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	1253000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91740000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91608000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7559294000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7634094000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	122594000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	126524000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11027000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12829000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	35991000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	46423000	usd
CY2023Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	182975000	usd
CY2022Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	180485000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	361690000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	398792000	usd
CY2023Q4	us-gaap	Assets Assets	12283415000	usd
CY2022Q4	us-gaap	Assets Assets	12336677000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2834655000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	3393666000	usd
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	7456501000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	6677614000	usd
CY2023Q4	us-gaap	Deposits Deposits	10291156000	usd
CY2022Q4	us-gaap	Deposits Deposits	10071280000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	187396000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	229806000	usd
CY2023Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	12000000	usd
CY2022Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	351054000	usd
CY2023Q4	buse	Long Term Debt Excluding Senior Notes Subordinated Notes And Junior Subordinated LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated	18000000	usd
CY2022Q4	buse	Long Term Debt Excluding Senior Notes Subordinated Notes And Junior Subordinated LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated	30000000	usd
CY2023Q4	us-gaap	Subordinated Debt SubordinatedDebt	222882000	usd
CY2022Q4	us-gaap	Subordinated Debt SubordinatedDebt	222038000	usd
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CY2022Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	71810000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11308000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12995000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	196699000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	201717000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	11011434000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	11190700000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
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CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	58000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	58000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1323595000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1320980000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	237197000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	168769000	usd
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CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-273278000	usd
CY2023Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	1342047000	usd
CY2022Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	1216529000	usd
CY2023Q4	us-gaap	Treasury Stock Value TreasuryStockValue	70066000	usd
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	70552000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1271981000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1145977000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12283415000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12336677000	usd
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	58116969	shares
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CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	41787000	usd
CY2023	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2678000	usd
CY2022	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3272000	usd
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3765000	usd
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CY2022	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	1475000	usd
CY2021	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	227000	usd
CY2022	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	1647000	usd
CY2021	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	279000	usd
CY2021	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	657000	usd
CY2023	us-gaap	Financing Interest Expense FinancingInterestExpense	0	usd
CY2021	us-gaap	Financing Interest Expense FinancingInterestExpense	1598000	usd
CY2023	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	12406000	usd
CY2022	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	12338000	usd
CY2021	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	9918000	usd
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	317052000	usd
CY2023	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	1089000	usd
CY2022	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	1895000	usd
CY2021	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	7239000	usd
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4701000	usd
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3663000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	5166000	usd
CY2023	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	-28000	usd
CY2022	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	50000	usd
CY2021	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	29000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-2171000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-2183000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	3041000	usd
CY2023	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11248000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	14822000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10292000	usd
CY2023	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	122384000	usd
CY2022	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	126803000	usd
CY2021	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	132804000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	162597000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	159016000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	145312000	usd
CY2023	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	23708000	usd
CY2022	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	21648000	usd
CY2021	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	21862000	usd
CY2023	us-gaap	Occupancy Net OccupancyNet	18214000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	19130000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	18346000	usd
CY2023	us-gaap	Equipment Expense EquipmentExpense	6759000	usd
CY2022	us-gaap	Equipment Expense EquipmentExpense	7645000	usd
CY2021	us-gaap	Equipment Expense EquipmentExpense	8301000	usd
CY2023	us-gaap	Professional Fees ProfessionalFees	7147000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	6125000	usd
CY2021	us-gaap	Professional Fees ProfessionalFees	7549000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10432000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11628000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11274000	usd
CY2023	buse	Interchange Expense InterchangeExpense	6864000	usd
CY2022	buse	Interchange Expense InterchangeExpense	6298000	usd
CY2021	buse	Interchange Expense InterchangeExpense	5792000	usd
CY2023	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	5650000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4058000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3083000	usd
CY2023	us-gaap	Other Noninterest Expense OtherNoninterestExpense	44161000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	48333000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	40261000	usd
CY2023	us-gaap	Noninterest Expense NoninterestExpense	285532000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	283881000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	261780000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	153904000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	161737000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	156823000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31339000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33426000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33374000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	122565000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	128311000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.21
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.32
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.23
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.29
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.20
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.96
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.92
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.92
CY2023	us-gaap	Net Income Loss NetIncomeLoss	122565000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	128311000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	123449000	usd
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	41824000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-199302000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-58610000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax	-34644000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-3934000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	19000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-44000	usd
CY2023	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss After Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax	-4426000	usd
CY2022	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss After Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax	-4745000	usd
CY2021	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss After Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	50184000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-229220000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-58566000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-1835000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-20717000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	736000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-6126000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-417000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-763000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	4291000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-20300000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1499000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	54475000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-249520000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-57067000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	177040000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-121209000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	66382000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1270069000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	123449000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-57067000	usd
CY2021	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	58955000	usd
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	33043000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	646000	usd
CY2021	buse	Stock Issued During Period Value Equity Instruments Other Than Options Vested And Related Tax Benefit StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit	-997000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.92
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	50764000	usd
CY2021	buse	Common Stock Dividends Restricted Stock Declared CommonStockDividendsRestrictedStockDeclared	0	usd
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	-7864000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	1319112000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	128311000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-249520000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	9912000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1157000	usd
CY2022	buse	Stock Issued During Period Value Equity Instruments Other Than Options Vested And Related Tax Benefit StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit	-1276000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised Net Of Tax Benefit Expense StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense	0	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.92
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	50863000	usd
CY2022	buse	Common Stock Dividends Restricted Stock Declared CommonStockDividendsRestrictedStockDeclared	0	usd
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	-8968000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1145977000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	122565000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	54475000	usd
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4482000	usd
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1011000	usd
CY2023	buse	Stock Issued During Period Value Equity Instruments Other Than Options Vested And Related Tax Benefit StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit	-1093000	usd
CY2023	buse	Stock Issued During Period Warrants Exercised Net Of Shares Redeemed And Tax Value StockIssuedDuringPeriodWarrantsExercisedNetOfSharesRedeemedAndTaxValue	9000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.96
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	53076000	usd
CY2023	buse	Common Stock Dividends Restricted Stock Declared CommonStockDividendsRestrictedStockDeclared	0	usd
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	-6595000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1271981000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	122565000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	128311000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	123449000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	2399000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	4623000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	-15101000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10432000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11628000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11274000	usd
CY2023	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	2785000	usd
CY2022	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	3540000	usd
CY2021	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	5292000	usd
CY2023	us-gaap	Investment Tax Credit InvestmentTaxCredit	8999000	usd
CY2022	us-gaap	Investment Tax Credit InvestmentTaxCredit	6333000	usd
CY2021	us-gaap	Investment Tax Credit InvestmentTaxCredit	5563000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9488000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	10482000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11610000	usd
CY2023	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-6971000	usd
CY2022	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-3932000	usd
CY2021	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	11545000	usd
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-14406000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-20799000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-24251000	usd
CY2023	buse	Accretion Of Premiums And Discounts On Time Deposits AccretionOfPremiumsAndDiscountsOnTimeDeposits	270000	usd
CY2022	buse	Accretion Of Premiums And Discounts On Time Deposits AccretionOfPremiumsAndDiscountsOnTimeDeposits	403000	usd
CY2021	buse	Accretion Of Premiums And Discounts On Time Deposits AccretionOfPremiumsAndDiscountsOnTimeDeposits	1142000	usd
CY2023	buse	Amortization Of Discount On Federal Home Loan Bank Advances AmortizationOfDiscountOnFederalHomeLoanBankAdvances	1027000	usd
CY2022	buse	Amortization Of Discount On Federal Home Loan Bank Advances AmortizationOfDiscountOnFederalHomeLoanBankAdvances	1400000	usd
CY2021	buse	Amortization Of Discount On Federal Home Loan Bank Advances AmortizationOfDiscountOnFederalHomeLoanBankAdvances	826000	usd
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	100000	usd
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	611000	usd
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1000	usd
CY2023	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	usd
CY2022	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	427000	usd
CY2021	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	3227000	usd
CY2023	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	1000	usd
CY2022	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-8000	usd
CY2021	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-639000	usd
CY2023	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	0	usd
CY2022	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	84000	usd
CY2021	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	0	usd
CY2023	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	-2171000	usd
CY2022	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	-2183000	usd
CY2021	us-gaap	Increase Decrease In Equity Securities Fv Ni IncreaseDecreaseInEquitySecuritiesFvNi	3041000	usd
CY2023	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	5475000	usd
CY2022	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	24000	usd
CY2021	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	usd
CY2023	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-5503000	usd
CY2022	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	26000	usd
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	29000	usd
CY2023	buse	Gain Loss On Sale Of Loans Net GainLossOnSaleOfLoansNet	733000	usd
CY2022	buse	Gain Loss On Sale Of Loans Net GainLossOnSaleOfLoansNet	1944000	usd
CY2021	buse	Gain Loss On Sale Of Loans Net GainLossOnSaleOfLoansNet	9323000	usd
CY2023	buse	Gains Losses On Sales Of Other Real Estate And Other Repossessed Assets GainsLossesOnSalesOfOtherRealEstateAndOtherRepossessedAssets	46000	usd
CY2022	buse	Gains Losses On Sales Of Other Real Estate And Other Repossessed Assets GainsLossesOnSalesOfOtherRealEstateAndOtherRepossessedAssets	-54000	usd
CY2021	buse	Gains Losses On Sales Of Other Real Estate And Other Repossessed Assets GainsLossesOnSalesOfOtherRealEstateAndOtherRepossessedAssets	-174000	usd
CY2023	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	450000	usd
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	825000	usd
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1023000	usd
CY2023	buse	Gain Loss On Life Insurance Proceeds GainLossOnLifeInsuranceProceeds	759000	usd
CY2022	buse	Gain Loss On Life Insurance Proceeds GainLossOnLifeInsuranceProceeds	0	usd
CY2021	buse	Gain Loss On Life Insurance Proceeds GainLossOnLifeInsuranceProceeds	1257000	usd
CY2023	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3942000	usd
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3663000	usd
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3909000	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2920000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1272000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-4665000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	6595000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8968000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	7864000	usd
CY2023	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	35413000	usd
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	70953000	usd
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	274356000	usd
CY2023	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	35018000	usd
CY2022	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	95289000	usd
CY2021	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	306074000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	17888000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	56284000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-7203000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	12826000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2633000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-28096000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	173390000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	165895000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	162012000	usd
CY2023	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	6617000	usd
CY2022	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	14820000	usd
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	11017000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	10436000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	280083000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2298055000	usd
CY2023	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	11644000	usd
CY2022	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	15418000	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	7254000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	105044000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	290955000	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	48927000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	70116000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	326252000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	470134000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	868083000	usd
CY2023	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	30957000	usd
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	12969000	usd
CY2021	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	usd
CY2023	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	43926000	usd
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	225000	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-228279000	usd
CY2023	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-65240000	usd
CY2022	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	541713000	usd
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-76826000	usd
CY2023	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	80000	usd
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	106000	usd
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	124000	usd
CY2023	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	2292000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	219000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	4755000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9533000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4989000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5042000	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4425000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4528000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7306000	usd
CY2023	buse	Proceeds From Sale Of Other Real Estate And Other Repossessed Assets Including Cash Payments Collected ProceedsFromSaleOfOtherRealEstateAndOtherRepossessedAssetsIncludingCashPaymentsCollected	860000	usd
CY2022	buse	Proceeds From Sale Of Other Real Estate And Other Repossessed Assets Including Cash Payments Collected ProceedsFromSaleOfOtherRealEstateAndOtherRepossessedAssetsIncludingCashPaymentsCollected	3076000	usd
CY2021	buse	Proceeds From Sale Of Other Real Estate And Other Repossessed Assets Including Cash Payments Collected ProceedsFromSaleOfOtherRealEstateAndOtherRepossessedAssetsIncludingCashPaymentsCollected	1590000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	550987000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-290964000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-829190000	usd
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	220146000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-696894000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	767474000	usd
CY2023	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-42410000	usd
CY2022	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-40333000	usd
CY2021	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	77874000	usd
CY2023	buse	Proceeds From Repayments Of Short Term Debt Excluding Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net ProceedsFromRepaymentsOfShortTermDebtExcludingFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-335000000	usd
CY2022	buse	Proceeds From Repayments Of Short Term Debt Excluding Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net ProceedsFromRepaymentsOfShortTermDebtExcludingFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	330000000	usd
CY2021	buse	Proceeds From Repayments Of Short Term Debt Excluding Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net ProceedsFromRepaymentsOfShortTermDebtExcludingFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	1000000	usd
CY2023	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	0	usd
CY2022	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	98094000	usd
CY2021	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	72500000	usd
CY2023	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	16054000	usd
CY2022	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	112678000	usd
CY2021	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	19158000	usd
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	53076000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	50863000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	50764000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4482000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9912000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	33043000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1093000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1276000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	997000	usd
CY2023	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	9000	usd
CY2022	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	usd
CY2021	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	usd
CY2023	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	usd
CY2022	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	usd
CY2021	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	150000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-231960000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-483862000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	814736000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	492417000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-608931000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	147558000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	227164000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	836095000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	688537000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	719581000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	227164000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	836095000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	135482000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	35297000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	25374000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	25408000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	30676000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	22487000	usd
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	189000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	175000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1610000	usd
CY2023	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	0	usd
CY2022	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	0	usd
CY2021	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	4808000	usd
CY2023	buse	Transfer Of Investment Securities Available For Sale To Held To Maturity TransferOfInvestmentSecuritiesAvailableForSaleToHeldToMaturity	0	usd
CY2022	buse	Transfer Of Investment Securities Available For Sale To Held To Maturity TransferOfInvestmentSecuritiesAvailableForSaleToHeldToMaturity	985199000	usd
CY2021	buse	Transfer Of Investment Securities Available For Sale To Held To Maturity TransferOfInvestmentSecuritiesAvailableForSaleToHeldToMaturity	0	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="ie7af00a57fc5426398d2265d4d07805f"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In preparing the accompanying </span><span style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#i9a680197a1004cbb801de4b7e0c146c0_211" style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Consolidated Financial Statements</a></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> in conformity with GAAP, Busey’s management is required to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and the disclosures provided. Actual results could differ from those estimates. Material estimates which are particularly susceptible to significant change in the near-term relate to the fair value of debt securities available for sale, fair value of assets acquired and liabilities assumed in business combinations, goodwill, income taxes, and the determination of the ACL.</span></div>
CY2023Q4	buse	Customer Assets Held In Trust CustomerAssetsHeldInTrust	12100000000	usd
CY2022Q4	buse	Customer Assets Held In Trust CustomerAssetsHeldInTrust	11100000000	usd
CY2023Q4	us-gaap	Aoci Debt Securities Available For Sale With Allowance For Credit Loss Cumulative Gain Loss After Tax AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax	13600000	usd
CY2023Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	1500000000	usd
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	1700000000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022Q4	us-gaap	Life Settlement Contracts Fair Value Method Face Value LifeSettlementContractsFairValueMethodFaceValue	5600000	usd
CY2023Q4	us-gaap	Life Settlement Contracts Fair Value Method Face Value LifeSettlementContractsFairValueMethodFaceValue	5600000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	6000000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	19000000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	127068000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	126349000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2023	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="i67c7c832b3844e798a735b35238789f2"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Derivative Financial Instruments</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey utilizes interest rate swap agreements as part of its asset liability management strategy to help manage its interest rate risk position. Additionally, Busey enters into derivative financial instruments, including interest rate lock commitments issued to residential loan customers for loans that will be held for sale, forward sales commitments to sell residential mortgage loans to investors, and interest rate swaps with customers and other third parties.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="idcbda5deb1474249bd4fc1a84afce9d9"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Interest Rate Swaps Designated as Cash Flow Hedges</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey entered into derivative instruments designated as cash flow hedges. For a derivative instrument that qualifies and is designated as a cash flow hedge, the change in fair value of the derivative instrument is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Changes in fair value of components excluded from the assessment of effectiveness are recognized in current earnings.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="i1c6e02c1eb2944cd9934d54cbc5529f1"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Interest Rate Swaps Not Designated as Hedges</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey may offer derivative contracts to its customers in connection with their risk management needs. Busey manages the risk associated with these contracts by entering into equal and offsetting derivatives with third-party dealers. Generally, these derivatives have worked together as an economic interest rate hedge, but Busey did not designate them for hedge accounting treatment. Consequently, changes in fair value of the corresponding derivative financial asset or liability were recorded as either a charge or credit to current earnings during the period in which the changes occurred.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="ie889ad57826649aab90e03b94b45dcdf"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Interest Rate Lock Commitments</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Interest rate lock commitments that meet the definition of derivative financial instruments under ASC Topic 815 </span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">“Derivatives and Hedging”</span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> are carried at their fair values in other assets or other liabilities in the </span><span style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#i9a680197a1004cbb801de4b7e0c146c0_211" style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Consolidated Financial Statements</a></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, with changes in the fair values of the corresponding derivative financial assets or liabilities recorded as either a charge or credit to current earnings during the period in which the changes occurred.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="i18d46ae5871645979963b058c183f489"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Forward Sales Commitments</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey economically hedges mortgage loans held for sale and interest rate lock commitments issued to its residential loan customers related to loans that will be held for sale by obtaining corresponding forward sales commitments with an investor to sell the loans at an agreed-upon price at the time the interest rate locks are issued to the customers. Forward sales commitments that meet the definition of derivative financial instruments under ASC Topic 815 </span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">“Derivatives and Hedging”</span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> are carried at their fair values in other assets or other liabilities in the </span><span style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#i9a680197a1004cbb801de4b7e0c146c0_211" style="color:#0000ff;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Consolidated Financial Statements</a></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. While such forward sales commitments generally served as an economic hedge to mortgage loans held for sale and interest rate lock commitments, Busey did not designate them for hedge accounting treatment. Changes in fair value of the corresponding derivative financial asset or liability were recorded as either a charge or credit to current earnings during the period in which the changes occurred.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="ia0593d825585404ba3d583d91a079c05"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Risk Participation Agreements</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey has entered into risk participation agreements to manage the credit risk of its derivative position. These agreements transfer credit risk related to an interest rate swap to another financial institution. Risk participation agreements that Busey has entered into are structured as follows:</span></div><div style="margin-bottom:10pt;margin-top:10pt;padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:12.55pt">Busey has a swap agreement with a customer. Busey (purchaser) entered into a risk participation agreement with a counterparty (seller), under which the counterparty receives a fee to accept a portion of the credit risk. If Busey’s customer defaults on the swap contract, the counterparty to the risk participation agreement must reimburse Busey for the counterparty's percentage of the positive fair value of the customer swap as of the default date. If the customer swap has a negative fair value, the counterparty has no reimbursement requirements. If Busey’s customer defaults on the swap contract and the counterparty (seller) fulfills its payment obligations under the risk participation agreement, the counterparty (seller) is entitled to a pro rata share of Busey’s claim against the customer under the terms of the swap agreement.</span></div><div style="margin-bottom:10pt;margin-top:10pt;padding-left:36pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:12.55pt">A counterparty has a swap agreement with a customer. Busey (seller) entered into a risk participation with a counterparty (purchaser), under which Busey receives a fee to accept a portion of the credit risk. If the counterparty’s customer defaults on the swap contract, Busey must reimburse the counterparty (purchaser) for Busey's percentage of the positive fair value of the customer swap as of the default date. If the customer swap has a negative fair value, Busey has no reimbursement requirements. If the counterparty’s customer defaults on the swap contract and Busey (seller) fulfills its payment obligations under the risk participation agreement, Busey (seller) is entitled to a pro rata share of the counterparty’s claim against the customer under the terms of the swap agreement.</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="i959c35f724f64389a77ef475f65df490"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Foreign Currency Forward Contracts</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Busey entered into foreign currency exchange contracts to support the business requirements of its customers. Foreign currency contracts involve the exchange of one currency for another on a specified date and at a specified rate. These contracts are executed on behalf of Busey's customers and are used by customers to manage fluctuations in foreign exchange rates. Busey minimizes its exposure by entering into similar offsetting positions with other financial institutions. Busey is subject to the credit risk that another party will fail to perform.</span></div>
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span id="if8bd8ff59aac454896895f4ef094a7b1"></span><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassifications</span></div><div style="margin-bottom:10pt;margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Verdana',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Reclassifications have been made to certain prior year account balances, with no effect on net income or stockholders’ equity, to be consistent with the classifications adopted as of and for the year ended December 31, 2023.</span></div>
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	2334630000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	186000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	247245000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2087571000	usd
CY2023Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	872628000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	142231000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	730397000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	2772453000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	144000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	311204000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2461393000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	918312000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	133017000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	785295000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	71960000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	71429000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	244231000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	230299000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	418655000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	388864000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	1599784000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	1396979000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	2334630000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2087571000	usd
CY2023Q4	us-gaap	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 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive	73943000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	69373000	usd
CY2023Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year5 Through10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10	28489000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	25824000	usd
CY2023Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10	770196000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	635200000	usd
CY2023Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	872628000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	730397000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	20000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	115000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	543000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	5523000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	89000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	514000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	26000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	29000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	13033000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	65000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	2049784000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	247180000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2062817000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	247245000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	730397000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	142231000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	730397000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	142231000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1070674000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	81841000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1368859000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	229363000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2439533000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	311204000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	58065000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	8009000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	727230000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	125008000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	785295000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	133017000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2062817000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	730397000	usd
CY2023Q4	buse	Debt Securities Fair Value DebtSecuritiesFairValue	2793214000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	247245000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	142231000	usd
CY2023Q4	buse	Debt Securities Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	389476000	usd
CY2023Q4	buse	Available For Sale Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.120
CY2023Q4	buse	Held For Maturity Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value HeldForMaturitySecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.195
CY2023Q4	buse	Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value SecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.139
CY2023Q4	buse	Total Count Of Debt Securities Available For Sale Securities TotalCountOfDebtSecuritiesAvailableForSaleSecurities	835	security
CY2023Q4	buse	Total Count Of Debt Securities Held To Maturity TotalCountOfDebtSecuritiesHeldToMaturity	55	security
CY2023Q4	buse	Total Count Of Debt Securities TotalCountOfDebtSecurities	890	security
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	779	security
CY2023Q4	buse	Debt Securities Held To Maturity Unrealized Loss Position Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionNumberOfPositions	55	security
CY2023Q4	buse	Debt Securities Unrealized Loss Position Number Of Positions DebtSecuritiesUnrealizedLossPositionNumberOfPositions	834	security
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2439533000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	785295000	usd
CY2022Q4	buse	Debt Securities Fair Value DebtSecuritiesFairValue	3224828000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	311204000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	133017000	usd
CY2022Q4	buse	Debt Securities Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	444221000	usd
CY2022Q4	buse	Available For Sale Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.128
CY2022Q4	buse	Held For Maturity Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value HeldForMaturitySecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.169
CY2022Q4	buse	Securities In Unrealized Loss Positions As Percentage Of Aggregate Carrying Value SecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue	0.138
CY2022Q4	buse	Total Count Of Debt Securities Available For Sale Securities TotalCountOfDebtSecuritiesAvailableForSaleSecurities	1091	security
CY2022Q4	buse	Total Count Of Debt Securities Held To Maturity TotalCountOfDebtSecuritiesHeldToMaturity	55	security
CY2022Q4	buse	Total Count Of Debt Securities TotalCountOfDebtSecurities	1146	security
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	1032	security
CY2022Q4	buse	Debt Securities Held To Maturity Unrealized Loss Position Number Of Positions DebtSecuritiesHeldToMaturityUnrealizedLossPositionNumberOfPositions	55	security
CY2022Q4	buse	Debt Securities Unrealized Loss Position Number Of Positions DebtSecuritiesUnrealizedLossPositionNumberOfPositions	1087	security
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7651034000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7725702000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91740000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91608000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7559294000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7634094000	usd
CY2023Q4	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	13500000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	14000000	usd
CY2023	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	-4500000	usd
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	-5900000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	88000	usd
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3569000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	contract
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7651034000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	1520323000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1785798000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	1552072000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	705335000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	468659000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	660624000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	958223000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7651034000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff	289000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	76000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	592000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	34000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	391000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	3036000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Writeoff FinancingReceivableExcludingAccruedInterestRevolvingWriteoff	0	usd
CY2023	buse	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Write Off FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossWriteOff	4418000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	2288440000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1926481000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	962405000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	558294000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	323245000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	644140000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	1022697000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7725702000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	375000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	7441000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	673000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	15067000	usd
CY2023	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1100000	usd
CY2022	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1200000	usd
CY2021	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1600000	usd
CY2023	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	400000	usd
CY2022	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	400000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	400000	usd
CY2023	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	0.0250
CY2023	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P16M24D
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	contract
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2023	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2023	buse	Collateral Dependent Loans CollateralDependentLoans	6100000	usd
CY2022	buse	Collateral Dependent Loans CollateralDependentLoans	14000000	usd
CY2023Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	10096000	usd
CY2023Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1256000	usd
CY2023Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1895000	usd
CY2023Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3151000	usd
CY2023Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	895000	usd
CY2023	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	9948000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	20608000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5801000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	9846000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	15647000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4501000	usd
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14551000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	101048000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	4178000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	-15101000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	4783000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	2545000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	87887000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	4623000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	3179000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	2277000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91608000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	2399000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	4418000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	2151000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91740000	usd
CY2023Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	7647883000	usd
CY2023Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3151000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7651034000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	90845000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	895000	usd
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	7710055000	usd
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	15647000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7725702000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	87107000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4501000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	91608000	usd
CY2023Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	125000	usd
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	70000	usd
CY2023Q4	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	0	usd
CY2022Q4	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	780000	usd
CY2023Q4	us-gaap	Foreclosed Assets ForeclosedAssets	125000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	850000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	850000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	4416000	usd
CY2020Q4	us-gaap	Foreclosed Assets ForeclosedAssets	4571000	usd
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	189000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	175000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1610000	usd
CY2023	buse	Sales Of Oreo SalesOfOREO	770000	usd
CY2022	buse	Sales Of Oreo SalesOfOREO	2565000	usd
CY2021	buse	Sales Of Oreo SalesOfOREO	1721000	usd
CY2023	buse	Other Real Estate Cash Payments Collected OtherRealEstateCashPaymentsCollected	44000	usd
CY2022	buse	Other Real Estate Cash Payments Collected OtherRealEstateCashPaymentsCollected	565000	usd
CY2021	buse	Other Real Estate Cash Payments Collected OtherRealEstateCashPaymentsCollected	43000	usd
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	100000	usd
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	611000	usd
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1000	usd
CY2023Q4	us-gaap	Foreclosed Assets ForeclosedAssets	125000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	850000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	4416000	usd
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-54000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-665000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-173000	usd
CY2023	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	67000	usd
CY2022	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	248000	usd
CY2021	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	468000	usd
CY2023	buse	Foreclosed Asset Losses And Expenses ForeclosedAssetLossesAndExpenses	121000	usd
CY2022	buse	Foreclosed Asset Losses And Expenses ForeclosedAssetLossesAndExpenses	913000	usd
CY2021	buse	Foreclosed Asset Losses And Expenses ForeclosedAssetLossesAndExpenses	641000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	222475000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	225853000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	99881000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	99329000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	122594000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	126524000	usd
CY2023	us-gaap	Depreciation Depreciation	9488000	usd
CY2022	us-gaap	Depreciation Depreciation	10482000	usd
CY2021	us-gaap	Depreciation Depreciation	11610000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11027000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12829000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11308000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	12995000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y4M20D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y10M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0359
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0345
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	2395000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	2495000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	2464000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	38000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	365000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	540000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	50000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	22000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	49000	usd
CY2023	us-gaap	Lease Cost LeaseCost	2483000	usd
CY2022	us-gaap	Lease Cost LeaseCost	2882000	usd
CY2021	us-gaap	Lease Cost LeaseCost	3053000	usd
CY2023	buse	Operating Lease Payments Fixed Payment OperatingLeasePaymentsFixedPayment	2290000	usd
CY2022	buse	Operating Lease Payments Fixed Payment OperatingLeasePaymentsFixedPayment	3080000	usd
CY2021	buse	Operating Lease Payments Fixed Payment OperatingLeasePaymentsFixedPayment	2417000	usd
CY2023	buse	Operating Lease Payments Liability Reduction OperatingLeasePaymentsLiabilityReduction	1883000	usd
CY2022	buse	Operating Lease Payments Liability Reduction OperatingLeasePaymentsLiabilityReduction	2285000	usd
CY2021	buse	Operating Lease Payments Liability Reduction OperatingLeasePaymentsLiabilityReduction	2217000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	231000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6206000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5818000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2023000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1768000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1443000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1277000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1255000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	5478000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	13244000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1936000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11308000	usd
CY2023	us-gaap	Lease Income LeaseIncome	724000	usd
CY2022	us-gaap	Lease Income LeaseIncome	707000	usd
CY2021	us-gaap	Lease Income LeaseIncome	566000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2023	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	usd
CY2022	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	usd
CY2023Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	132203000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	96212000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35991000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	132203000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	85780000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	46423000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10432000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11628000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11274000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	9220000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	7843000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6706000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5581000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4443000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2198000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35991000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2834655000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	3393666000	usd
CY2023Q4	buse	Interest Bearing Transaction Deposits InterestBearingTransactionDeposits	2717139000	usd
CY2022Q4	buse	Interest Bearing Transaction Deposits InterestBearingTransactionDeposits	2857818000	usd
CY2023Q4	buse	Deposits Interest Bearing Transaction Deposits Saving Deposits And Money Market Deposits DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits	2920088000	usd
CY2022Q4	buse	Deposits Interest Bearing Transaction Deposits Saving Deposits And Money Market Deposits DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits	2964421000	usd
CY2023Q4	us-gaap	Time Deposits TimeDeposits	1819274000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	855375000	usd
CY2023Q4	us-gaap	Deposits Deposits	10291156000	usd
CY2022Q4	us-gaap	Deposits Deposits	10071280000	usd
CY2023Q4	buse	Brokered Saving Deposits And Money Market Deposits BrokeredSavingDepositsAndMoneyMarketDeposits	6001000	usd
CY2022Q4	buse	Brokered Saving Deposits And Money Market Deposits BrokeredSavingDepositsAndMoneyMarketDeposits	1303000	usd
CY2023Q4	buse	Brokered Time Deposits BrokeredTimeDeposits	285000	usd
CY2022Q4	buse	Brokered Time Deposits BrokeredTimeDeposits	275000	usd
CY2023Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	1072189000	usd
CY2022Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	416445000	usd
CY2023Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	386286000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	120377000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1705846000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	68738000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	21222000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	12470000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	10451000	usd
CY2023Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	547000	usd
CY2023Q4	us-gaap	Time Deposits TimeDeposits	1819274000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	187396000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	229806000	usd
CY2023Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0326
CY2022Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0191
CY2023Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	12000000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	351054000	usd
CY2022	buse	Debt Weighted Average Maturity Period DebtWeightedAverageMaturityPeriod	P5D
CY2022Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0	usd
CY2023Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	18000000	usd
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	30000000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	2118000	usd
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	2962000	usd
CY2023Q4	buse	Fair Value Adjustment Weighted Average Remaining Life Balance FairValueAdjustmentWeightedAverageRemainingLifeBalance	2600000	usd
CY2023Q4	buse	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	1155973000	usd
CY2023Q4	buse	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1309
CY2023Q4	buse	Common Equity Tier One Risk Based Capital Required For Capital Adequacy CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy	397331000	usd
CY2023Q4	buse	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0450
CY2023Q4	buse	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized	573923000	usd
CY2023Q4	buse	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0650
CY2023Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	1229973000	usd
CY2023Q4	buse	Tier One Risk Based Capital To Risk Weighted Assets Percent TierOneRiskBasedCapitalToRiskWeightedAssetsPercent	0.1393
CY2023Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	529775000	usd
CY2023Q4	buse	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Percent TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent	0.0600
CY2023Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	706367000	usd
CY2023Q4	buse	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Percent TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent	0.0800
CY2023Q4	us-gaap	Capital Capital	1540318000	usd
CY2023Q4	buse	Capital To Risk Weighted Assets Percent CapitalToRiskWeightedAssetsPercent	0.1744
CY2023Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	706367000	usd
CY2023Q4	buse	Capital Required For Capital Adequacy To Risk Weighted Assets Percent CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent	0.0800
CY2023Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	882958000	usd
CY2023Q4	buse	Capital Required To Be Well Capitalized To Risk Weighted Assets Percent CapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent	0.1000
CY2023Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	1229973000	usd
CY2023Q4	buse	Tier One Leverage Capital To Average Assets Percent TierOneLeverageCapitalToAverageAssetsPercent	0.1008
CY2023Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	488315000	usd
CY2023Q4	buse	Tier One Leverage Capital Required For Capital Adequacy To Average Assets Percent TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsPercent	0.0400
CY2022Q4	buse	Common Equity Tier One Risk Based Capital CommonEquityTierOneRiskBasedCapital	1081686000	usd
CY2022Q4	buse	Common Equity Tier One Risk Based Capital To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets	0.1196
CY2022Q4	buse	Common Equity Tier One Risk Based Capital Required For Capital Adequacy CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy	406980000	usd
CY2022Q4	buse	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0450
CY2022Q4	buse	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized	587861000	usd
CY2022Q4	buse	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0650
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	1155686000	usd
CY2022Q4	buse	Tier One Risk Based Capital To Risk Weighted Assets Percent TierOneRiskBasedCapitalToRiskWeightedAssetsPercent	0.1278
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	542640000	usd
CY2022Q4	buse	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Percent TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent	0.0600
CY2022Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	723521000	usd
CY2022Q4	buse	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Percent TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent	0.0800
CY2022Q4	us-gaap	Capital Capital	1457994000	usd
CY2022Q4	buse	Capital To Risk Weighted Assets Percent CapitalToRiskWeightedAssetsPercent	0.1612
CY2022Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	723521000	usd
CY2022Q4	buse	Capital Required For Capital Adequacy To Risk Weighted Assets Percent CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent	0.0800
CY2022Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	904401000	usd
CY2022Q4	buse	Capital Required To Be Well Capitalized To Risk Weighted Assets Percent CapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent	0.1000
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	1155686000	usd
CY2022Q4	buse	Tier One Leverage Capital To Average Assets Percent TierOneLeverageCapitalToAverageAssetsPercent	0.0945
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	489124000	usd
CY2022Q4	buse	Tier One Leverage Capital Required For Capital Adequacy To Average Assets Percent TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsPercent	0.0400
CY2023	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	90000000	usd
CY2022	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	95000000	usd
CY2021	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	60000000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20139000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20815000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20261000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	14120000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	13883000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8448000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1557000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-700000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3644000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1363000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-572000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1021000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31339000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33426000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33374000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.010
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.011
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.011
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.002
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.001
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.065
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.065
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.045
CY2023	buse	Effective Income Tax Rate Reconciliation Income Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationIncomeBankOwnedLifeInsurance	0.006
CY2022	buse	Effective Income Tax Rate Reconciliation Income Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationIncomeBankOwnedLifeInsurance	0.005
CY2021	buse	Effective Income Tax Rate Reconciliation Income Bank Owned Life Insurance EffectiveIncomeTaxRateReconciliationIncomeBankOwnedLifeInsurance	0.007
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.060
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.056
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.036
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.012
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.204
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.207
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.213
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	27068000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	26979000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	6654000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	8365000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	70423000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	88666000	usd
CY2023Q4	buse	Deferred Tax Asset Debt Securities Held To Maturity Unrealized Loss DeferredTaxAssetDebtSecuritiesHeldToMaturityUnrealizedLoss	10156000	usd
CY2022Q4	buse	Deferred Tax Asset Debt Securities Held To Maturity Unrealized Loss DeferredTaxAssetDebtSecuritiesHeldToMaturityUnrealizedLoss	11919000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	5767000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	5504000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	53000	usd
CY2023Q4	buse	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	764000	usd
CY2022Q4	buse	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	656000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	456000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	411000	usd
CY2023Q4	buse	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	3092000	usd
CY2022Q4	buse	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	3564000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	4789000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	3298000	usd
CY2023Q4	buse	Deferred Tax Assets Unrealized Loss On Equity Securities DeferredTaxAssetsUnrealizedLossOnEquitySecurities	75000	usd
CY2022Q4	buse	Deferred Tax Assets Unrealized Loss On Equity Securities DeferredTaxAssetsUnrealizedLossOnEquitySecurities	0	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	67000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	376000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	129311000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	149791000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2830000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1541000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	8341000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	6669000	usd
CY2023Q4	buse	Deferred Tax Liabilities Purchase Accounting Adjustments DeferredTaxLiabilitiesPurchaseAccountingAdjustments	1133000	usd
CY2022Q4	buse	Deferred Tax Liabilities Purchase Accounting Adjustments DeferredTaxLiabilitiesPurchaseAccountingAdjustments	1207000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1336000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	2132000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4709000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	6956000	usd
CY2023Q4	buse	Deferred Tax Liabilities Deferred Expense Deferred Loan Origination Costs DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts	3691000	usd
CY2022Q4	buse	Deferred Tax Liabilities Deferred Expense Deferred Loan Origination Costs DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts	3845000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3015000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3518000	usd
CY2023Q4	buse	Deferred Tax Liabilities Unrealized Gains On Equity Securities DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities	0	usd
CY2022Q4	buse	Deferred Tax Liabilities Unrealized Gains On Equity Securities DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities	512000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	251000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	586000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	25306000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	26966000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	104005000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	122825000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	0	usd
CY2023Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	0	usd
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2023	buse	Defined Contribution Plan Second Employer Matching Contribution Percent Of Second Match DefinedContributionPlanSecondEmployerMatchingContributionPercentOfSecondMatch	0.50
CY2023	buse	Defined Contribution Plan Second Employer Matching Contribution Percent Of Employees Gross Pay DefinedContributionPlanSecondEmployerMatchingContributionPercentOfEmployeesGrossPay	0.02
CY2023	buse	Defined Contribution Plan Vesting Period DefinedContributionPlanVestingPeriod	P5Y
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6776000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7054000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6531000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	26106	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.53
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y10M17D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	31000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	4840	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	23.53
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	21266	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.53
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y10M17D
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	27000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	21266	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	23.53
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y10M17D
CY2023Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	27000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6595000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8968000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7864000	usd
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	10639000	usd
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	13024000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y4M24D
CY2022	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y6M
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	55341000	usd
CY2023	buse	Loans And Leases Receivable Related Parties Addition Reduction Due To Change In Relationship LoansAndLeasesReceivableRelatedPartiesAdditionReductionDueToChangeInRelationship	9247000	usd
CY2023	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	34116000	usd
CY2023	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	21055000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	77649000	usd
CY2023Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	2176496000	usd
CY2022Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	2024777000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	122565000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	128311000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	123449000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55432322	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55387073	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55369476	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56256148	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56137164	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56008805	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.21
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.32
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.23
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.18
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.29
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.20
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	168381	shares
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	235704	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	165826	shares
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2023Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	317873000	usd
CY2023Q4	us-gaap	Assets Assets	12283415000	usd
CY2022Q4	us-gaap	Assets Assets	12336677000	usd
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	319451000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	323438000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	270698000	usd
CY2023	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	122384000	usd
CY2022	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	126803000	usd
CY2021	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	132804000	usd
CY2023	us-gaap	Noninterest Expense NoninterestExpense	285532000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	283881000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	261780000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	153904000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	161737000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	156823000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	122565000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	128311000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	123449000	usd
CY2023	buse	Income From Dissolution Of Non Bank Subsidiaries IncomeFromDissolutionOfNonBankSubsidiaries	733000	usd
CY2022	buse	Income From Dissolution Of Non Bank Subsidiaries IncomeFromDissolutionOfNonBankSubsidiaries	0	usd
CY2021	buse	Income From Dissolution Of Non Bank Subsidiaries IncomeFromDissolutionOfNonBankSubsidiaries	0	usd
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
0000314489-24-000054-index-headers.html	Edgar Link	pending
0000314489-24-000054-index.html	Edgar Link	pending
0000314489-24-000054.txt	Edgar Link	pending
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buse-20231231.htm	Edgar Link	pending
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$BUSE
First Busey Corp Stock $buse

2024 Q1 Form 10-K Financial Statement

#000031448924000054 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BUSE First Busey Corp Stock $buse

2024 Q1 Form 10-K Financial Statement

#000031448924000054 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BUSE
First Busey Corp Stock $buse