$OSBC
Old Second Bancorp Inc Stock $osbc

$osbc Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000155837023003286 Filed on March 09, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$70.16M		$216.5M
YoY Change	61.9%		105.74%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$1.774M		$15.80M
YoY Change	-71.52%		98.98%
% of Gross Profit
Depreciation & Amortization	$1.046M	$1.651M	$4.085M
YoY Change	-3.68%	43.57%	29.6%
% of Gross Profit
Operating Expenses	$1.774M		$15.80M
YoY Change	-71.52%		98.98%
Operating Profit
YoY Change
Interest Expense	$6.073M		$10.32M
YoY Change	189.33%		22.08%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$32.01M	$31.85M	$91.55M
YoY Change	94.69%	-376.02%	228.52%
Income Tax	$8.406M	$8.238M	$24.14M
% Of Pretax Income	26.26%	25.86%	26.37%
Net Earnings	$23.61M	$23.62M	$67.41M
YoY Change	96.4%	-360.36%	236.29%
Net Earnings / Revenue	33.65%		31.14%
Basic Earnings Per Share	$0.53		$1.51
Diluted Earnings Per Share	$0.52	$522.1K	$1.491M
COMMON SHARES
Basic Shares Outstanding	44.67M	44.57M	44.53M
Diluted Shares Outstanding	45.32M		45.21M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$103.0M	$115.2M
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	$72.55M	$76.92M	$76.92M
YoY Change	-15.8%	-12.59%	-12.59%
Goodwill	$86.48M	$86.48M
YoY Change	0.17%	0.17%
Intangibles	$13.05M	$13.68M
YoY Change	-16.53%	-16.11%
Long-Term Investments
YoY Change
Other Assets	$37.85M	$44.75M	$44.75M
YoY Change	67.25%	633.61%	633.61%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$5.920B	$5.888B	$5.888B
YoY Change	-4.88%	-5.21%	-5.21%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$342.9M	$122.2M	$122.2M
YoY Change	922.93%	142.85%	142.85%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$342.9M	$122.2M	$122.2M
YoY Change	922.93%	142.85%	142.85%
LONG-TERM LIABILITIES
Long-Term Debt	$129.7M	$138.7M	$138.7M
YoY Change	-12.07%	-6.63%	-6.63%
Other Long-Term Liabilities	$53.59M	$55.64M	$55.64M
YoY Change	69.18%	23.37%	23.37%
Total Long-Term Liabilities	$183.3M	$194.3M	$194.3M
YoY Change	2.3%	0.36%	0.36%
TOTAL LIABILITIES
Total Short-Term Liabilities	$342.9M	$122.2M	$122.2M
Total Long-Term Liabilities	$183.3M	$194.3M	$194.3M
Total Liabilities	$5.423B	$5.427B	$5.427B
YoY Change	-5.8%	-4.96%	-4.96%
SHAREHOLDERS EQUITY
Retained Earnings	$331.9M	$310.5M
YoY Change	26.77%	23.21%
Common Stock	$44.71M	$44.71M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$496.9M	$461.1M	$461.1M
YoY Change
Total Liabilities & Shareholders Equity	$5.920B	$5.888B	$5.888B
YoY Change	-4.88%	-5.21%	-5.21%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$23.61M	$23.62M	$67.41M
YoY Change	96.4%	-360.36%	236.29%
Depreciation, Depletion And Amortization	$1.046M	$1.651M	$4.085M
YoY Change	-3.68%	43.57%	29.6%
Cash From Operating Activities	$35.00M	$37.28M	$97.34M
YoY Change	12491.37%	-289.06%	213.54%
INVESTING ACTIVITIES
Capital Expenditures	$1.560M	$1.662M	$4.332M
YoY Change	220.33%	-251.09%	113.08%
Acquisitions			$146.0K
YoY Change			-100.1%
Other Investing Activities	-$41.36M	$75.24M	-$428.4M
YoY Change	-76.51%	-60.61%	-417.48%
Cash From Investing Activities	-$42.92M	$73.58M	-$432.8M
YoY Change	-75.69%	-61.26%	-425.6%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-4.237M	-111.8M	-301.5M
YoY Change	-107.2%	-278.51%	-216.75%
NET CHANGE
Cash From Operating Activities	35.00M	37.28M	97.34M
Cash From Investing Activities	-42.92M	73.58M	-432.8M
Cash From Financing Activities	-4.237M	-111.8M	-301.5M
Net Change In Cash	-12.16M	-977.0K	-636.9M
YoY Change	-89.65%	-100.42%	-250.86%
FREE CASH FLOW
Cash From Operating Activities	$35.00M	$37.28M	$97.34M
Capital Expenditures	$1.560M	$1.662M	$4.332M
Free Cash Flow	$33.44M	$35.62M	$93.01M
YoY Change	-16101.91%	-291.31%	220.58%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000357173
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Entity Registrant Name EntityRegistrantName	OLD SECOND BANCORP INC
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	000-10537
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-3143493
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	37 South River Street
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Aurora
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60507
CY2022	dei	City Area Code CityAreaCode	(630)
CY2022	dei	Local Phone Number LocalPhoneNumber	892-0202
CY2022	dei	Security12b Title Security12bTitle	Common Stock
CY2022	dei	Trading Symbol TradingSymbol	OSBC
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	563500000
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	44665127
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	56632000
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CY2021	us-gaap	Noninterest Income NoninterestIncome	39260000
CY2020	us-gaap	Noninterest Income NoninterestIncome	37487000
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	86573000
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	57691000
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	49547000
CY2022	us-gaap	Equipment Expense EquipmentExpense	14992000
CY2021	us-gaap	Equipment Expense EquipmentExpense	13548000
CY2020	us-gaap	Equipment Expense EquipmentExpense	8498000
CY2022	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	15795000
CY2021	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	7936000
CY2020	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	5143000
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2401000
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	975000
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	597000
CY2022	osbc	Net Teller And Bill Paying Expense NetTellerAndBillPayingExpense	3730000
CY2021	osbc	Net Teller And Bill Paying Expense NetTellerAndBillPayingExpense	874000
CY2020	osbc	Net Teller And Bill Paying Expense NetTellerAndBillPayingExpense	648000
CY2022	us-gaap	General Insurance Expense GeneralInsuranceExpense	1221000
CY2021	us-gaap	General Insurance Expense GeneralInsuranceExpense	1214000
CY2020	us-gaap	General Insurance Expense GeneralInsuranceExpense	1030000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2626000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	644000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	494000
CY2022	us-gaap	Advertising Expense AdvertisingExpense	589000
CY2021	us-gaap	Advertising Expense AdvertisingExpense	343000
CY2020	us-gaap	Advertising Expense AdvertisingExpense	298000
CY2022	osbc	Debit Card Interchange Expense DebitCardInterchangeExpense	4348000
CY2021	osbc	Debit Card Interchange Expense DebitCardInterchangeExpense	2538000
CY2020	osbc	Debit Card Interchange Expense DebitCardInterchangeExpense	2195000
CY2022	us-gaap	Legal Fees LegalFees	873000
CY2021	us-gaap	Legal Fees LegalFees	1096000
CY2020	us-gaap	Legal Fees LegalFees	761000
CY2022	osbc	Consulting And Management Fee Expense ConsultingAndManagementFeeExpense	2425000
CY2021	osbc	Consulting And Management Fee Expense ConsultingAndManagementFeeExpense	5005000
CY2020	osbc	Consulting And Management Fee Expense ConsultingAndManagementFeeExpense	760000
CY2022	osbc	Other Real Estate Owned Expense OtherRealEstateOwnedExpense	130000
CY2021	osbc	Other Real Estate Owned Expense OtherRealEstateOwnedExpense	151000
CY2020	osbc	Other Real Estate Owned Expense OtherRealEstateOwnedExpense	651000
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	15470000
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	11767000
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	10795000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	151173000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	103782000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	81417000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	91549000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27867000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	37408000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24144000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7823000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9583000
CY2022	osbc	Non Cash Transfer Of Fixed Assets To Other Assets NonCashTransferOfFixedAssetsToOtherAssets	4568000
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	67405000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20044000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27825000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.16
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.04
CY2022	us-gaap	Net Income Loss NetIncomeLoss	67405000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	20044000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	27825000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-139876000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-8513000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	14690000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-39166000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2406000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	4122000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-100710000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-6107000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	10568000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-944000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	232000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-25000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-265000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	65000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-7000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-679000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	167000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-18000
CY2022	osbc	Other Comprehensive Income Available For Sale Securities Unrealized Holding Gain Loss Net Reclassification Adjustment For Amounts Realized After Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesUnrealizedHoldingGainLossNetReclassificationAdjustmentForAmountsRealizedAfterTax	-100031000
CY2021	osbc	Other Comprehensive Income Available For Sale Securities Unrealized Holding Gain Loss Net Reclassification Adjustment For Amounts Realized After Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesUnrealizedHoldingGainLossNetReclassificationAdjustmentForAmountsRealizedAfterTax	-6274000
CY2020	osbc	Other Comprehensive Income Available For Sale Securities Unrealized Holding Gain Loss Net Reclassification Adjustment For Amounts Realized After Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesUnrealizedHoldingGainLossNetReclassificationAdjustmentForAmountsRealizedAfterTax	10586000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-2579000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	389000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-533000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-718000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	109000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-147000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-1861000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	280000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-386000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-101892000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5994000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10200000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-34487000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	14050000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	38025000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	67405000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	20044000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	27825000
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5217000
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2932000
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2329000
CY2022	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-944000
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	232000
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-25000
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	6550000
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4326000
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	10413000
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	76607000
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	239175000
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	384379000
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	81776000
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	254374000
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	388538000
CY2022	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	2022000
CY2021	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	9300000
CY2020	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	15519000
CY2022	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-3177000
CY2021	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-1261000
CY2020	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	3999000
CY2022	osbc	Net Discount Accretion Of Purchase Accounting Adjustment On Loans NetDiscountAccretionOfPurchaseAccountingAdjustmentOnLoans	6339000
CY2021	osbc	Net Discount Accretion Of Purchase Accounting Adjustment On Loans NetDiscountAccretionOfPurchaseAccountingAdjustmentOnLoans	1177000
CY2020	osbc	Net Discount Accretion Of Purchase Accounting Adjustment On Loans NetDiscountAccretionOfPurchaseAccountingAdjustmentOnLoans	911000
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	718000
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1390000
CY2020	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1233000
CY2022	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	163000
CY2021	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	41000
CY2020	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	204000
CY2022	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	104000
CY2021	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	79000
CY2020	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	357000
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4085000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3152000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2798000
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	3809000
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2017000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2626000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	644000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	494000
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	12048000
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-9286000
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	811000
CY2022	osbc	Deferred Income Tax Expense Benefit After Deferred Tax Asset Valuation Adjustment DeferredIncomeTaxExpenseBenefitAfterDeferredTaxAssetValuationAdjustment	969000
CY2021	osbc	Deferred Income Tax Expense Benefit After Deferred Tax Asset Valuation Adjustment DeferredIncomeTaxExpenseBenefitAfterDeferredTaxAssetValuationAdjustment	6479000
CY2020	osbc	Deferred Income Tax Expense Benefit After Deferred Tax Asset Valuation Adjustment DeferredIncomeTaxExpenseBenefitAfterDeferredTaxAssetValuationAdjustment	-646000
CY2022	osbc	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	940000
CY2021	osbc	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	-6865000
CY2020	osbc	Increase Decrease In Accrued Interest Receivable And Other Assets IncreaseDecreaseInAccruedInterestReceivableAndOtherAssets	17692000
CY2022	osbc	Net Premium Amortization Discount Accretion Of Purchase Accounting Adjustments On Loans NetPremiumAmortizationDiscountAccretionOfPurchaseAccountingAdjustmentsOnLoans	-1582000
CY2021	osbc	Net Premium Amortization Discount Accretion Of Purchase Accounting Adjustments On Loans NetPremiumAmortizationDiscountAccretionOfPurchaseAccountingAdjustmentsOnLoans	-155000
CY2022	osbc	Increase Decrease In Accrued Interest Payable And Other Liabilities IncreaseDecreaseInAccruedInterestPayableAndOtherLiabilities	6225000
CY2021	osbc	Increase Decrease In Accrued Interest Payable And Other Liabilities IncreaseDecreaseInAccruedInterestPayableAndOtherLiabilities	-11075000
CY2020	osbc	Increase Decrease In Accrued Interest Payable And Other Liabilities IncreaseDecreaseInAccruedInterestPayableAndOtherLiabilities	6893000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	2960000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	1435000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	2089000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	97344000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	31047000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	25987000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	279848000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	138874000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	48054000
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	30981000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	605846000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	18006000
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	301649000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	886103000
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	65229000
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	1444000
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	8717000
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	443904000
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-122102000
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	103887000
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	590000
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	591000
CY2020	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	590000
CY2020	osbc	Death Claim On Bank Owned Life Insurance DeathClaimOnBankOwnedLifeInsurance	484000
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	941000
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	5828000
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	3275000
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	13346000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4332000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2033000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3921000
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	146000
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-148995000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-432778000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	132918000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-103808000
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-353927000
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	235078000
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	410324000
CY2022	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-18181000
CY2021	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-16643000
CY2020	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	18287000
CY2022	osbc	Proceeds From Repayments Of Other Short Term Borrowings ProceedsFromRepaymentsOfOtherShortTermBorrowings	90000000
CY2020	osbc	Proceeds From Repayments Of Other Short Term Borrowings ProceedsFromRepaymentsOfOtherShortTermBorrowings	-48500000
CY2020	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	32604000
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	59148000
CY2020	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	20000000
CY2022	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	4000000
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	4000000
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	3000000
CY2022	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	-6056000
CY2021	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	-315000
CY2020	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	-307000
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	8877000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4612000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1186000
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	455000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10417000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5922000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-301496000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	258239000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	357092000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-636930000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	422204000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	279271000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	752107000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	329903000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	50632000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	115177000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	752107000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	329903000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10324000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10612000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7922000
CY2022	osbc	Interest Paid For Deposits InterestPaidForDeposits	3418000
CY2021	osbc	Interest Paid For Deposits InterestPaidForDeposits	2752000
CY2020	osbc	Interest Paid For Deposits InterestPaidForDeposits	7255000
CY2022	osbc	Interest Paid For Borrowings InterestPaidForBorrowings	6777000
CY2021	osbc	Interest Paid For Borrowings InterestPaidForBorrowings	5366000
CY2020	osbc	Interest Paid For Borrowings InterestPaidForBorrowings	5093000
CY2022	osbc	Non Cash Transfer Of Loans To Other Real Estate Owned NonCashTransferOfLoansToOtherRealEstateOwned	87000
CY2021	osbc	Non Cash Transfer Of Loans To Other Real Estate Owned NonCashTransferOfLoansToOtherRealEstateOwned	196000
CY2020	osbc	Non Cash Transfer Of Loans To Other Real Estate Owned NonCashTransferOfLoansToOtherRealEstateOwned	898000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	277864000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	27825000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10200000
CY2020	osbc	Dividends Declared And Paid Per Share DividendsDeclaredAndPaidPerShare	0.04
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	1186000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2089000
CY2020	osbc	Treasury Stock Purchase From Taxes Withheld On Stock Awards TreasuryStockPurchaseFromTaxesWithheldOnStockAwards	423000
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	5499000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	307087000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	307087000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	20044000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5994000
CY2021	osbc	Dividends Declared And Paid Per Share DividendsDeclaredAndPaidPerShare	0.16
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	4612000
CY2021	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	194484000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1435000
CY2021	osbc	Treasury Stock Purchase From Taxes Withheld On Stock Awards TreasuryStockPurchaseFromTaxesWithheldOnStockAwards	605000
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	9812000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	502027000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	502027000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	67405000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-101892000
CY2022	osbc	Dividends Declared And Paid Per Share DividendsDeclaredAndPaidPerShare	0.20
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	8904000
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2960000
CY2022	osbc	Treasury Stock Purchase From Taxes Withheld On Stock Awards TreasuryStockPurchaseFromTaxesWithheldOnStockAwards	455000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	461141000
CY2022	osbc	Number Of Banking Centers From Which Bank Operates NumberOfBankingCentersFromWhichBankOperates	50
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><b style="font-weight:bold;">Use of Estimates</b> – The preparation of consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) and following general practices within the banking industry requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual results could differ from those estimates.</p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p>
CY2021Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	6200000
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	547800000
CY2021Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	501300000
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	2089000
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><b style="font-weight:bold;">Concentration of Credit Risk</b> – Most of the Company’s business activity is with customers located within Cook, DeKalb, DuPage, Kane, Kendall, LaSalle and Will counties in Illinois. These banking centers surround or are within the Chicago metropolitan area. Therefore, the Company’s exposure to credit risk is significantly affected by changes in the economy in that market area since the Bank generally makes loans within this market. There are no significant concentrations of loans where the customers’ ability to honor loan terms is dependent upon a single economic sector.</p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p>
CY2022	osbc	Period From Due Date After Which Accrual Of Interest Income Is Discontinued PeriodFromDueDateAfterWhichAccrualOfInterestIncomeIsDiscontinued	P90D
CY2022	osbc	Period From Due Date After Which Accrual Of Interest Income Is Discontinued PeriodFromDueDateAfterWhichAccrualOfInterestIncomeIsDiscontinued	P90D
CY2022	osbc	Period From Due Date After Which Accrual Of Interest Income Is Discontinued PeriodFromDueDateAfterWhichAccrualOfInterestIncomeIsDiscontinued	P90D
CY2022	osbc	Period From Due Date After Which Accrual Of Interest Income Is Discontinued PeriodFromDueDateAfterWhichAccrualOfInterestIncomeIsDiscontinued	P90D
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	24626000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	252
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	5115000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	758861000
CY2022	osbc	Number Of Home Equity Lines Of Credit Segments Merged NumberOfHomeEquityLinesOfCreditSegmentsMerged	2
CY2022	osbc	Number Of Home Equity Lines Of Credit Segments NumberOfHomeEquityLinesOfCreditSegments	1
CY2022Q4	osbc	Mortgage Loans Servicing Asset At Fair Value Amount MortgageLoansServicingAssetAtFairValueAmount	771400000
CY2021Q4	osbc	Mortgage Loans Servicing Asset At Fair Value Amount MortgageLoansServicingAssetAtFairValueAmount	801900000
CY2022	osbc	Us Government And Agencies Debt Securities Percentage Of Guarantee UsGovernmentAndAgenciesDebtSecuritiesPercentageOfGuarantee	1
CY2022	osbc	Us Government And Agencies Debt Securities Threshold Percentage Of Guarantee For Allowance Of Credit Loss UsGovernmentAndAgenciesDebtSecuritiesThresholdPercentageOfGuaranteeForAllowanceOfCreditLoss	1
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	33855000
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	50478000
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	43129000
CY2022	us-gaap	Revenue Recognition Sales Of Goods RevenueRecognitionSalesOfGoods	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><b style="font-weight:bold;">Noninterest Income </b>– The Company recognizes revenue when the performance obligations related to the transfer of goods or services are satisfied. Certain obligations are satisfied at one point in time, while other obligations may be satisfied over a period of time. Revenues are segregated based on the nature of the product or service offered. Wealth management fees, service charges on deposits and card related income are included as components of noninterest income in the Consolidated Statements of Income.</p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><span style="font-style:italic;font-weight:bold;">Wealth management</span> – includes fees generated from personal, commercial and institutional clients. The Company also provides asset management services, cash management services and income tax reporting. Revenue is recognized over the period of time in which these services are performed.</p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><span style="font-style:italic;font-weight:bold;">Service charges on deposits </span>– includes fees and income received by the Company for performing various services, such as deposit account maintenance fees, overdraft coverage and processing fees, stop payment charges, and other deposit account related services. Revenue is recognized based on the service agreement in place, and is recorded when the service is provided to the customer. This item is net of any service charge refunds or return charge refunds.</p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><span style="font-style:italic;font-weight:bold;">Card related income </span>– includes interchange fees earned on debit cards and credit cards, ATM/ITM related fee income, and gift card related income. Annual fees and interest income on card-related products are recognized within interest income in accordance with ASC 310. The Company recognizes card related income when the cardholder’s transaction with the merchant or ATM/ITM occurs, thus satisfying the performance obligation. Card related expenses, such as disbursements to the payment network, reward program costs, and other operational costs are carried within card related expense, as a component of noninterest expense, on the Consolidated Statements of Income. </p><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:10pt;visibility:hidden;"></span></p>
CY2022	osbc	Percentage Of Forfeiture Assumptions For Group Grant PercentageOfForfeitureAssumptionsForGroupGrant	0.05
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	44281000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	19789000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9166000
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3068000
CY2022Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	1184133000
CY2021Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	1635802000
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	5574000
CY2021	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	966000
CY2022	osbc	Certain Unfunded Commitments Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainUnfundedCommitmentsAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	893000
CY2021	osbc	Certain Unfunded Commitments Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainUnfundedCommitmentsAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	74000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	115200000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	752100000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1662819000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	370000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	123830000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1539359000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1678160000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	20587000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5115000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1693632000
CY2022Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	6800000
CY2021Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	4300000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	5600000
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	7100000
CY2022Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	14900000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	62369000
CY2022	osbc	Available For Sale Securities Debt Maturities Within One Year Amortized Cost Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCostWeightedAverageYield	0.0069
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	60279000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	247711000
CY2022	osbc	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostWeightedAverageYield	0.0114
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	231925000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	43941000
CY2022	osbc	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostWeightedAverageYield	0.0275
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	39785000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	181210000
CY2022	osbc	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost Weighted Average Yield AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostWeightedAverageYield	0.0304
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	171938000
CY2022Q4	osbc	Available For Sale Debt Maturities Before Securities Without Single Maturity Date Amortized Cost Basis AvailableForSaleDebtMaturitiesBeforeSecuritiesWithoutSingleMaturityDateAmortizedCostBasis	535231000
CY2022	osbc	Available For Sale Debt Maturities Before Securities Without Single Maturity Date Weighted Average Yield AvailableForSaleDebtMaturitiesBeforeSecuritiesWithoutSingleMaturityDateWeightedAverageYield	0.0186
CY2022Q4	osbc	Available For Sale Debt Maturities Before Securities Without Single Maturity Date Fair Value AvailableForSaleDebtMaturitiesBeforeSecuritiesWithoutSingleMaturityDateFairValue	503927000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1662819000
CY2022	osbc	Available For Sale Securities Weighted Average Yield AvailableForSaleSecuritiesWeightedAverageYield	0.0300
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1539359000
CY2022Q4	osbc	Number Of Securities Issued From Originators NumberOfSecuritiesIssuedFromOriginators	0
CY2022Q4	osbc	Number Of Originators That Company Has Invested Over Specified Percentage Of Its Stockholders Equity NumberOfOriginatorsThatCompanyHasInvestedOverSpecifiedPercentageOfItsStockholdersEquity	1
CY2022	osbc	Minimum Percentage Of Securities Investment From Originators MinimumPercentageOfSecuritiesInvestmentFromOriginators	0.10
CY2022Q4	osbc	Available For Sale Securities In Unrealized Loss Position Less Than12 Months Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositionLessThan12MonthsQualitativeDisclosureNumberOfPositions	194
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	27304000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	579571000
CY2022Q4	osbc	Available For Sale Securities In Unrealized Loss Positions12 Months Or Longer Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositions12MonthsOrLongerQualitativeDisclosureNumberOfPositions	299
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	96526000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	906689000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	493
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	123830000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1486260000
CY2021Q4	osbc	Available For Sale Securities In Unrealized Loss Position Less Than12 Months Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositionLessThan12MonthsQualitativeDisclosureNumberOfPositions	241
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4230000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	734235000
CY2021Q4	osbc	Available For Sale Securities In Unrealized Loss Positions12 Months Or Longer Qualitative Disclosure Number Of Positions AvailableForSaleSecuritiesInUnrealizedLossPositions12MonthsOrLongerQualitativeDisclosureNumberOfPositions	11
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	885000
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	30981000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	605846000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	18006000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	270000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	17000
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	944000
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	38000
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	42000
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-944000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	232000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-25000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-265000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	65000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-7000
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.281
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.280
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.280
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3869609000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3420804000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	49480000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44281000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3820129000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3376523000
CY2022Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	15900000
CY2022Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	15900000
CY2021Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	9200000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	44281000
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6750000
CY2022	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2460000
CY2022	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	909000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	49480000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	33855000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2795000
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5933000
CY2021	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1489000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3869609000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1262000
CY2021Q4	osbc	Financing Receivable Nonaccrual Including Purchased Credit Impaired Loans FinancingReceivableNonaccrualIncludingPurchasedCreditImpairedLoans	3420804000
CY2021Q4	osbc	Loans And Leases Receivable Including Purchased Credit Impaired Loans Net Of Deferred Income LoansAndLeasesReceivableIncludingPurchasedCreditImpairedLoansNetOfDeferredIncome	3110000
CY2021	osbc	Financing Receivable Modifications Number Of Contracts With Deferral Request Due To Cares Act FinancingReceivableModificationsNumberOfContractsWithDeferralRequestDueToCaresAct	7
CY2021	osbc	Financing Receivable Modifications Number Of Contracts Cares Act FinancingReceivableModificationsNumberOfContractsCaresAct	509
CY2021	osbc	Financing Receivable Troubled Debt Restructuring Postmodification Cares Act FinancingReceivableTroubledDebtRestructuringPostmodificationCaresAct	7800000
CY2021	osbc	Financing Receivable Modifications Number Of Contracts Cares Act Resumed Payments FinancingReceivableModificationsNumberOfContractsCaresActResumedPayments	502
CY2021	osbc	Financing Receivable Troubled Debt Restructuring Premodification Cares Act FinancingReceivableTroubledDebtRestructuringPremodificationCaresAct	234900000
CY2021	osbc	Financing Receivable Modifications Number Of Contracts In Non Accrual Status Due To Cares Act FinancingReceivableModificationsNumberOfContractsInNonAccrualStatusDueToCaresAct	6
CY2021	osbc	Financing Receivable Modifications Number Of Contracts With Deferral Request Due To Cares Act FinancingReceivableModificationsNumberOfContractsWithDeferralRequestDueToCaresAct	7
CY2021Q4	osbc	Loans And Leases Receivable Including Purchased Credit Impaired Loans Net Of Deferred Income Non Accrual LoansAndLeasesReceivableIncludingPurchasedCreditImpairedLoansNetOfDeferredIncomeNonAccrual	7700000
CY2022	osbc	Financing Receivable Modifications Number Of Contracts With Deferral Request Due To Cares Act FinancingReceivableModificationsNumberOfContractsWithDeferralRequestDueToCaresAct	0
CY2022	osbc	Financing Receivable Modifications Number Of Contracts Cares Act Resumed Payments FinancingReceivableModificationsNumberOfContractsCaresActResumedPayments	509
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	31602000
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	18404000
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	41531000
CY2021Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	37145000
CY2022	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	284000000
CY2022	us-gaap	Loans And Leases Receivable Impaired Interest Income Recognized Change In Present Value Attributable To Passage Of Time LoansAndLeasesReceivableImpairedInterestIncomeRecognizedChangeInPresentValueAttributableToPassageOfTime	108000000
CY2022Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	1207348000
CY2022Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	886935000
CY2022Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	476753000
CY2022Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	257206000
CY2022Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	167647000
CY2022Q4	osbc	Financing Receivable Prior Loans FinancingReceivablePriorLoans	245580000
CY2022Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	628140000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3869609000
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4
CY2022	osbc	Financing Receivables Troubled Debt Restructuring FinancingReceivablesTroubledDebtRestructuring	478000
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1
CY2021	osbc	Financing Receivables Troubled Debt Restructuring FinancingReceivablesTroubledDebtRestructuring	2300000
CY2021Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0
CY2022Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10162000
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	783000
CY2022	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	267000
CY2021	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	11836000
CY2022	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1946000
CY2021	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	2457000
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	8483000
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	10162000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2356000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2474000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	5004000
CY2022	osbc	Real Estate Acquisitions Through Foreclosures Net Of Acquisition Adjustments RealEstateAcquisitionsThroughForeclosuresNetOfAcquisitionAdjustments	87000
CY2021	osbc	Real Estate Acquisitions Through Foreclosures Net Of Acquisition Adjustments RealEstateAcquisitionsThroughForeclosuresNetOfAcquisitionAdjustments	5748000
CY2020	osbc	Real Estate Acquisitions Through Foreclosures Net Of Acquisition Adjustments RealEstateAcquisitionsThroughForeclosuresNetOfAcquisitionAdjustments	898000
CY2022	osbc	Real Estate Cost Of Real Estate Sold Net Of Gain Loss RealEstateCostOfRealEstateSoldNetOfGainLoss	778000
CY2021	osbc	Real Estate Cost Of Real Estate Sold Net Of Gain Loss RealEstateCostOfRealEstateSoldNetOfGainLoss	5787000
CY2020	osbc	Real Estate Cost Of Real Estate Sold Net Of Gain Loss RealEstateCostOfRealEstateSoldNetOfGainLoss	3071000
CY2022	osbc	Real Estate Owned Valuation Allowance Provision Net Of Adjustment RealEstateOwnedValuationAllowanceProvisionNetOfAdjustment	104000
CY2021	osbc	Real Estate Owned Valuation Allowance Provision Net Of Adjustment RealEstateOwnedValuationAllowanceProvisionNetOfAdjustment	79000
CY2020	osbc	Real Estate Owned Valuation Allowance Provision Net Of Adjustment RealEstateOwnedValuationAllowanceProvisionNetOfAdjustment	357000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1561000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2356000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2474000
CY2021Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	1179000
CY2020Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	1643000
CY2019Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	6712000
CY2022	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	104000
CY2021	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	79000
CY2020	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	357000
CY2022	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	427000
CY2021	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	543000
CY2020	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	5426000
CY2022Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	856000
CY2021Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	1179000
CY2020Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	1643000
CY2022	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	163000
CY2021	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	41000
CY2020	osbc	Gains Losses On Sales Of Other Real Estate Before Provision For Valuation Allowance GainsLossesOnSalesOfOtherRealEstateBeforeProvisionForValuationAllowance	204000
CY2022	osbc	Real Estate Owned Valuation Allowance Provision Benefit RealEstateOwnedValuationAllowanceProvisionBenefit	104000
CY2021	osbc	Real Estate Owned Valuation Allowance Provision Benefit RealEstateOwnedValuationAllowanceProvisionBenefit	79000
CY2020	osbc	Real Estate Owned Valuation Allowance Provision Benefit RealEstateOwnedValuationAllowanceProvisionBenefit	357000
CY2022	osbc	Real Estate Acquired Through Foreclosure Operating Expenses RealEstateAcquiredThroughForeclosureOperatingExpenses	193000
CY2021	osbc	Real Estate Acquired Through Foreclosure Operating Expenses RealEstateAcquiredThroughForeclosureOperatingExpenses	133000
CY2020	osbc	Real Estate Acquired Through Foreclosure Operating Expenses RealEstateAcquiredThroughForeclosureOperatingExpenses	535000
CY2022	osbc	Lease Revenue For Other Real Estate LeaseRevenueForOtherRealEstate	4000
CY2021	osbc	Lease Revenue For Other Real Estate LeaseRevenueForOtherRealEstate	4000
CY2020	osbc	Lease Revenue For Other Real Estate LeaseRevenueForOtherRealEstate	37000
CY2022	osbc	Foreclosed Real Estate Expense Net Of Lease Revenue ForeclosedRealEstateExpenseNetOfLeaseRevenue	130000
CY2021	osbc	Foreclosed Real Estate Expense Net Of Lease Revenue ForeclosedRealEstateExpenseNetOfLeaseRevenue	167000
CY2020	osbc	Foreclosed Real Estate Expense Net Of Lease Revenue ForeclosedRealEstateExpenseNetOfLeaseRevenue	651000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	144789000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	72434000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	72355000
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	161545000
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	73540000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	88005000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1621000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1173000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	23599000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	21669000
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2051702000
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2087649000
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1145592000
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1178542000
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	609338000
CY2021Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	593259000
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	862170000
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	1102972000
CY2022Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	244017000
CY2021Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	296298000
CY2022Q4	osbc	Time Deposits100000 To250000 TimeDeposits100000To250000	157438000
CY2021Q4	osbc	Time Deposits100000 To250000 TimeDeposits100000To250000	138794000
CY2022Q4	osbc	Time Deposits250000 Or More TimeDeposits250000OrMore	40466000
CY2021Q4	osbc	Time Deposits250000 Or More TimeDeposits250000OrMore	68718000
CY2022Q4	us-gaap	Deposits Deposits	5110723000
CY2021Q4	us-gaap	Deposits Deposits	5466232000
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	37000000.0
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	37000000.0
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	10100000
CY2022Q4	us-gaap	Deposit Liabilities With Abnormal Terms DepositLiabilitiesWithAbnormalTerms	13800000
CY2021Q4	us-gaap	Deposit Liabilities With Abnormal Terms DepositLiabilitiesWithAbnormalTerms	26800000
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	310978000
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	71879000
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	35870000
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	17191000
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	6003000
CY2022Q4	us-gaap	Time Deposits TimeDeposits	441921000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4107000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1636000
CY2022Q4	osbc	Deferred Tax Assets Goodwill And Intangible Liabilities Goodwill DeferredTaxAssetsGoodwillAndIntangibleLiabilitiesGoodwill	-229000
CY2022Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	3103000
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1982000
CY2022Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	260811000
CY2021Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	198876000
CY2022	osbc	Threshold For Disclosure Percentage Of Stockholders Equity ThresholdForDisclosurePercentageOfStockholdersEquity	0.10
CY2022Q4	osbc	Federal Home Loan Bank Advances As Percentage Of Total Assets FederalHomeLoanBankAdvancesAsPercentageOfTotalAssets	0.35
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	59300000
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	59200000
CY2020Q1	osbc	Trust Preferred Securities Cash Distribution Rate Percentage TrustPreferredSecuritiesCashDistributionRatePercentage	0.0780
CY2020Q1	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	1.75
CY2020Q1	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	30000000.0
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	58337000
CY2021	osbc	Debt Maturities Repayments Of Principal Weighted Average Interest Rate In Next Twelve Months DebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateInNextTwelveMonths	0.0037
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	131156000
CY2022	osbc	Debt Maturities Repayments Of Principal Weighted Average Interest Rate In Next Twelve Months DebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateInNextTwelveMonths	0.0289
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	9000000
CY2021	osbc	Long Term Debt Maturities Repayments Of Principal Weighted Average Interest Rate In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateInYearTwo	0.0185
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	44585000
CY2022	osbc	Long Term Debt Maturities Repayments Of Principal Weighted Average Interest Rate In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateInYearFour	0.0602
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	46554000
CY2021	osbc	Long Term Debt Maturities Repayments Of Principal Weighted Average Interest Rate In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateInYearFive	0.0588
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	85070000
CY2022	osbc	Long Term Debt Maturities Repayments Of Principal Weighted Average Interest Rate After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateAfterYearFive	0.0391
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	84985000
CY2021	osbc	Long Term Debt Maturities Repayments Of Principal Weighted Average Interest Rate After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRateAfterYearFive	0.0389
CY2022Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	260811000
CY2022	osbc	Debt Maturities Repayments Of Principal Weighted Average Interest Rate DebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRate	0.0376
CY2021Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	198876000
CY2021	osbc	Debt Maturities Repayments Of Principal Weighted Average Interest Rate DebtMaturitiesRepaymentsOfPrincipalWeightedAverageInterestRate	0.0323
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1000
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13241000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	750000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6269000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6209000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	594000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3960000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3338000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4445000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-135000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1356000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2034000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-511000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24144000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7823000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9583000
CY2022Q4	osbc	Accrued Bonus AccruedBonus	2700000
CY2021Q4	osbc	Accrued Bonus AccruedBonus	1362000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	15591000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	14636000
CY2022Q4	osbc	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensation	1292000
CY2021Q4	osbc	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Deferred Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensation	1293000
CY2021Q4	osbc	Deferred Tax Assets Goodwill And Intangible Assets Goodwill DeferredTaxAssetsGoodwillAndIntangibleAssetsGoodwill	919000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1257000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	911000
CY2022Q4	osbc	Deferred Tax Assets Business Combination Adjustments DeferredTaxAssetsBusinessCombinationAdjustments	1138000
CY2021Q4	osbc	Deferred Tax Assets Business Combination Adjustments DeferredTaxAssetsBusinessCombinationAdjustments	882000
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	493000
CY2022Q4	osbc	Deferred Tax Liabilities Intangible Assets Amortization DeferredTaxLiabilitiesIntangibleAssetsAmortization	3673000
CY2021Q4	osbc	Deferred Tax Liabilities Intangible Assets Amortization DeferredTaxLiabilitiesIntangibleAssetsAmortization	4269000
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1921000
CY2021Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	2458000
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2025000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1814000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	15058000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	12159000
CY2022Q4	osbc	Deferred Tax Assets Liabilities Gross DeferredTaxAssetsLiabilitiesGross	8541000
CY2021Q4	osbc	Deferred Tax Assets Liabilities Gross DeferredTaxAssetsLiabilitiesGross	9510000
CY2022Q4	osbc	Tax Effect Of Adjustments Related To Other Comprehensive Loss TaxEffectOfAdjustmentsRelatedToOtherComprehensiveLoss	36209000
CY2021Q4	osbc	Tax Effect Of Adjustments Related To Other Comprehensive Loss TaxEffectOfAdjustmentsRelatedToOtherComprehensiveLoss	-3410000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	44750000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	6100000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19225000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5852000
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7856000
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1097000
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1069000
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1067000
CY2022	osbc	Income Tax Reconciliation Non Deductible Bank Owned Life Insurance Income IncomeTaxReconciliationNonDeductibleBankOwnedLifeInsuranceIncome	151000
CY2021	osbc	Income Tax Reconciliation Non Deductible Bank Owned Life Insurance Income IncomeTaxReconciliationNonDeductibleBankOwnedLifeInsuranceIncome	292000
CY2020	osbc	Income Tax Reconciliation Non Deductible Bank Owned Life Insurance Income IncomeTaxReconciliationNonDeductibleBankOwnedLifeInsuranceIncome	271000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6091000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2054000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2570000
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-43000
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	54000
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	297000
CY2021	osbc	Effective Income Tax Rate Reconciliation Transaction Cost EffectiveIncomeTaxRateReconciliationTransactionCost	396000
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	119000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	828000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	198000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24144000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7823000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9583000
CY2022	osbc	Condition Performance Measure Fully Earned Vesting Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Rights Percentage ConditionPerformanceMeasureFullyEarnedVestingShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage	0.50
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3000000.0
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1400000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2100000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44526655
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30208663
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	29623333
CY2022	us-gaap	Net Income Loss NetIncomeLoss	67405000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	20044000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	27825000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	44526655
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30208663
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	29623333
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45213088
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30737862
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30174072
CY2022	us-gaap	Net Income Loss NetIncomeLoss	67405000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	20044000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	27825000
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2022Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	572000
CY2022	osbc	Operating Leases Lease Revenue Expense Net OperatingLeasesLeaseRevenueExpenseNet	396000
CY2021	osbc	Operating Leases Lease Revenue Expense Net OperatingLeasesLeaseRevenueExpenseNet	361000
CY2020	osbc	Operating Leases Lease Revenue Expense Net OperatingLeasesLeaseRevenueExpenseNet	223000
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	1900000
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	1200000
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	1000000.0
CY2022	osbc	Percentage Of Increase In Allowance For Credit Losses PercentageOfIncreaseInAllowanceForCreditLosses	0.25
CY2022Q4	osbc	Deferment Of Cumulative Effect Of Impact On Retained Earnings Due To Adoption Of New Accounting Standard DefermentOfCumulativeEffectOfImpactOnRetainedEarningsDueToAdoptionOfNewAccountingStandard	2900000
CY2022	osbc	Percentage Of Increase In Allowance For Credit Losses PercentageOfIncreaseInAllowanceForCreditLosses	0.25
CY2022	osbc	Dividend Restrictions Number Of Previous Years Retained Profit DividendRestrictionsNumberOfPreviousYearsRetainedProfit	P2Y
CY2022Q4	us-gaap	Amount Available For Dividend Distribution Without Affecting Capital Adequacy Requirements AmountAvailableForDividendDistributionWithoutAffectingCapitalAdequacyRequirements	18500000
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CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1543000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1792000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1595000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1631000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	10036000
CY2022Q4	osbc	Tier One Risk Based Capital Common Equity TierOneRiskBasedCapitalCommonEquity	457206000
CY2022Q4	osbc	Tier One Risk Based Capital Common Equity To Risk Weighted Assets TierOneRiskBasedCapitalCommonEquityToRiskWeightedAssets	0.000967
CY2022Q4	osbc	Tier One Risk Based Common Capital Required For Capital Adequacy TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy	330966000
CY2022Q4	osbc	Tier One Risk Based Common Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.000700
CY2022Q4	us-gaap	Capital Capital	592039000
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1252
CY2022Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	496518000
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.1050
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	482206000
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1020
CY2022Q4	osbc	Tier One Risk Based Capital Required For Capital Adequacy With Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithBuffer	401838000
CY2022Q4	osbc	Tier One Risk Based Capital Required For Capital Adequacy With Buffer To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithBufferToRiskWeightedAssets	0.0850
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	482206000
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0814
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	236956000
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q4	osbc	Tier One Risk Based Capital Common Equity TierOneRiskBasedCapitalCommonEquity	394421000
CY2021Q4	osbc	Tier One Risk Based Capital Common Equity To Risk Weighted Assets TierOneRiskBasedCapitalCommonEquityToRiskWeightedAssets	0.000946
CY2021Q4	osbc	Tier One Risk Based Common Capital Required For Capital Adequacy TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy	291855000
CY2021Q4	osbc	Tier One Risk Based Common Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.000700
CY2021Q4	us-gaap	Capital Capital	522932000
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1255
CY2021Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	437513000
CY2021Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.1050
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	419421000
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1006
CY2021Q4	osbc	Tier One Risk Based Capital Required For Capital Adequacy With Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithBuffer	354382000
CY2021Q4	osbc	Tier One Risk Based Capital Required For Capital Adequacy With Buffer To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithBufferToRiskWeightedAssets	0.0850
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	419421000
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0781
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	214812000
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2022Q4	osbc	Phase Out Of Allowance For Credit Loss PhaseOutOfAllowanceForCreditLoss	3800000
CY2022	osbc	Amount Of Loans Held For Sale Sold AmountOfLoansHeldForSaleSold	76600000
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	81800000
CY2022	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	2000000.0
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	65300000
CY2022Q4	osbc	Impaired Financing Receivable Related Allowance Including Purchased Credit Impaired Loans Adjustment ImpairedFinancingReceivableRelatedAllowanceIncludingPurchasedCreditImpairedLoansAdjustment	17600000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	18500000
CY2021Q4	osbc	Impaired Financing Receivable Related Allowance Including Purchased Credit Impaired Loans Adjustment ImpairedFinancingReceivableRelatedAllowanceIncludingPurchasedCreditImpairedLoansAdjustment	5400000
CY2021	osbc	Impaired Financing Receivable Decrease Of Specific Allocations Within Provision For Loan Losses ImpairedFinancingReceivableDecreaseOfSpecificAllocationsWithinProvisionForLoanLosses	2700000
CY2022	osbc	Derivative Liability Statement Of Financial Position Extensible Enumeration Not Disclosed Flag DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	true
CY2022	osbc	Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag DerivativeAssetStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	true
CY2022	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	4200000
CY2021	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	2400000
CY2020	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	2700000
CY2022	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	373000
CY2021	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	56000
CY2020	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	57000
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	300000
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	300000
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2000000.0
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1400000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1200000
CY2022	dei	Auditor Name AuditorName	Plante & Moran PLLC
CY2022	dei	Auditor Location AuditorLocation	Chicago, Illinois
CY2022	dei	Auditor Firm AuditorFirmId	166

Files In Submission

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$OSBC
Old Second Bancorp Inc Stock $osbc

2023 Q1 Form 10-K Financial Statement

#000155837023003286 Filed on March 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OSBC Old Second Bancorp Inc Stock $osbc

2023 Q1 Form 10-K Financial Statement

#000155837023003286 Filed on March 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OSBC
Old Second Bancorp Inc Stock $osbc