$OBK
Origin Bancorp Inc Stock $obk

$obk Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000151691222000031 Filed on February 23, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue		$241.7M	$59.42M
YoY Change		5.66%	4.77%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.700M	$6.000M	$1.700M
YoY Change	0.0%	3.45%	0.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$25.40M	$7.603M
YoY Change		-31.65%	-39.77%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$33.18M	$132.4M	$21.98M
YoY Change	50.93%	198.58%	37.38%
Income Tax	$4.860M	$23.89M	$4.431M
% Of Pretax Income	14.65%	18.04%	20.16%
Net Earnings	$28.32M	$108.5M	$17.55M
YoY Change	61.35%	198.56%	36.84%
Net Earnings / Revenue		44.92%	29.54%
Basic Earnings Per Share		$4.63	$0.75
Diluted Earnings Per Share	$1.200M	$4.60	$0.75
COMMON SHARES
Basic Shares Outstanding	23.50M shares	23.43M shares	23.51M shares
Diluted Shares Outstanding		23.61M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.241B		$1.432B
YoY Change	56.51%		71.91%
Cash & Equivalents	$705.6M		$377.2M
Short-Term Investments	$1.535B		$1.054B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$80.69M	$104.4M	$81.76M
YoY Change	-1.31%	0.97%	1.62%
Goodwill	$34.37M		$26.74M
YoY Change	28.52%		0.0%
Intangibles	$16.96M
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$7.861B	$7.861B	$7.628B
YoY Change	3.05%	3.05%	43.26%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$90.30M	$90.30M	$88.00M
YoY Change	2.61%	6.36%	26.44%
Deferred Revenue
YoY Change
Short-Term Debt	$52.80M	$52.80M
YoY Change		-17.37%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$90.30M	$90.30M	$88.00M
YoY Change	2.61%	6.36%	26.44%
LONG-TERM LIABILITIES
Long-Term Debt	$160.3M	$160.3M	$157.2M
YoY Change	1.97%	0.0%	1487.88%
Other Long-Term Liabilities			$0.00
YoY Change
Total Long-Term Liabilities	$160.3M	$160.3M	$157.2M
YoY Change	1.97%	0.0%	1487.88%
TOTAL LIABILITIES
Total Short-Term Liabilities	$90.30M	$90.30M	$88.00M
Total Long-Term Liabilities	$160.3M	$160.3M	$157.2M
Total Liabilities	$7.131B	$7.131B	$6.981B
YoY Change	2.15%	2.15%	47.74%
SHAREHOLDERS EQUITY
Retained Earnings	$363.6M		$266.6M
YoY Change	36.38%		11.14%
Common Stock	$360.8M		$354.9M
YoY Change	1.68%		0.52%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$730.2M	$730.2M	$647.2M
YoY Change
Total Liabilities & Shareholders Equity	$7.861B	$7.861B	$7.628B
YoY Change	3.05%	3.05%	43.26%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$28.32M	$108.5M	$17.55M
YoY Change	61.35%	198.56%	36.84%
Depreciation, Depletion And Amortization	$1.700M	$6.000M	$1.700M
YoY Change	0.0%	3.45%	0.0%
Cash From Operating Activities	$26.80M	$171.5M	-$7.200M
YoY Change	-472.22%	19233.15%	-131.86%
INVESTING ACTIVITIES
Capital Expenditures	-$1.500M	$5.015M	-$4.000M
YoY Change	-62.5%	-30.33%	300.0%
Acquisitions		$7.457M
YoY Change
Other Investing Activities	-$84.70M	$17.90M	-$354.0M
YoY Change	-76.07%	-100.85%	-1499.21%
Cash From Investing Activities	-$86.20M	$12.85M	-$357.9M
YoY Change	-75.92%	-100.61%	-1578.93%
FINANCING ACTIVITIES
Cash Dividend Paid		$11.53M
YoY Change		30.17%
Common Stock Issuance & Retirement, Net		$1.256M
YoY Change		73.72%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	413.1M	$144.1M	520.4M
YoY Change	-20.62%	-93.45%	-913.13%
NET CHANGE
Cash From Operating Activities	26.80M	$171.5M	-7.200M
Cash From Investing Activities	-86.20M	$12.85M	-357.9M
Cash From Financing Activities	413.1M	$144.1M	520.4M
Net Change In Cash	353.7M	$328.4M	155.3M
YoY Change	127.75%	283.22%	-1002.91%
FREE CASH FLOW
Cash From Operating Activities	$26.80M	$171.5M	-$7.200M
Capital Expenditures	-$1.500M	$5.015M	-$4.000M
Free Cash Flow	$28.30M	$166.5M	-$3.200M
YoY Change	-984.38%	-2737.78%	-113.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	dei	Entity File Number EntityFileNumber	001-38487
CY2021	dei	Entity Registrant Name EntityRegistrantName	Origin Bancorp, Inc.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	LA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	72-1192928
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CY2021	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	814000	USD
CY2020	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	2546000	USD
CY2019	us-gaap	Gain Loss On Oil And Gas Hedging Activity GainLossOnOilAndGasHedgingActivity	2185000	USD
CY2021	obnk	Feesand Commissions Other1 FeesandCommissionsOther1	2879000	USD
CY2020	obnk	Feesand Commissions Other1 FeesandCommissionsOther1	2253000	USD
CY2019	obnk	Feesand Commissions Other1 FeesandCommissionsOther1	1490000	USD
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10162000	USD
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	5061000	USD
CY2019	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4777000	USD
CY2021	us-gaap	Noninterest Income NoninterestIncome	62193000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	64652000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	46478000	USD
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	93026000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	91105000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	88974000	USD
CY2021	obnk	Occupancy Netand Equipment Expense OccupancyNetandEquipmentExpense	17347000	USD
CY2020	obnk	Occupancy Netand Equipment Expense OccupancyNetandEquipmentExpense	17022000	USD
CY2019	obnk	Occupancy Netand Equipment Expense OccupancyNetandEquipmentExpense	16759000	USD
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9117000	USD
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	8321000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6961000	USD
CY2021	obnk	Electronic Banking Expense ElectronicBankingExpense	3563000	USD
CY2020	obnk	Electronic Banking Expense ElectronicBankingExpense	3686000	USD
CY2019	obnk	Electronic Banking Expense ElectronicBankingExpense	3441000	USD
CY2021	us-gaap	Communication Communication	1574000	USD
CY2020	us-gaap	Communication Communication	1767000	USD
CY2019	us-gaap	Communication Communication	2098000	USD
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3438000	USD
CY2020	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3710000	USD
CY2019	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3808000	USD
CY2021	us-gaap	Professional Fees ProfessionalFees	3644000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	3975000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	3577000	USD
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2904000	USD
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3826000	USD
CY2019	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1694000	USD
CY2021	us-gaap	Loan Processing Fee LoanProcessingFee	7688000	USD
CY2020	us-gaap	Loan Processing Fee LoanProcessingFee	6316000	USD
CY2019	us-gaap	Loan Processing Fee LoanProcessingFee	4174000	USD
CY2021	obnk	Officeand Operations Expense OfficeandOperationsExpense	6399000	USD
CY2020	obnk	Officeand Operations Expense OfficeandOperationsExpense	5624000	USD
CY2019	obnk	Officeand Operations Expense OfficeandOperationsExpense	6674000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	844000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1060000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1321000	USD
CY2021	obnk	Franchise Tax Expense FranchiseTaxExpense	2538000	USD
CY2020Q4	obnk	Investment In Tax Credit Entities InvestmentInTaxCreditEntities	7600000	USD
CY2020	obnk	Franchise Tax Expense FranchiseTaxExpense	2186000	USD
CY2019	obnk	Franchise Tax Expense FranchiseTaxExpense	2160000	USD
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4697000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3337000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2433000	USD
CY2021	us-gaap	Noninterest Expense NoninterestExpense	156779000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	151935000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	144074000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	132431000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	44353000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	66548000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23885000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7996000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12666000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	108546000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	36357000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53882000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.63
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.56
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.30
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.60
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.55
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.28
CY2021	us-gaap	Net Income Loss NetIncomeLoss	108546000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	36357000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53882000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-24061000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	25646000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	11439000	USD
CY2021	obnk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturityBeforeTax	-10000	USD
CY2020	obnk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturityBeforeTax	-10000	USD
CY2019	obnk	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturityBeforeTax	-10000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1748000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	580000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	20000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-25819000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	25056000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	11409000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-5422000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	5262000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	2396000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-20397000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	19794000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	9013000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-739000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-216000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-204000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-134000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	37000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	604000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-605000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-253000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	127000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-127000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-53000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	477000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-478000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-200000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19920000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	19316000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8813000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	88626000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	55673000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62695000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	549779000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53882000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8813000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2413000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5887000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	10059000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	599262000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	36357000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	19316000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2568000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.3775
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	8870000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	723000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	647150000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	108546000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19920000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-228000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.49
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11539000	USD
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1256000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	730211000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	108546000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	36357000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53882000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-10765000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	59900000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	9568000	USD
CY2021	obnk	Depreciationand Amortization Excluding Amortizationof Investment Premiumsand Discountsand Qualified Affordable Housing Projects Investments DepreciationandAmortizationExcludingAmortizationofInvestmentPremiumsandDiscountsandQualifiedAffordableHousingProjectsInvestments	6830000	USD
CY2020	obnk	Depreciationand Amortization Excluding Amortizationof Investment Premiumsand Discountsand Qualified Affordable Housing Projects Investments DepreciationandAmortizationExcludingAmortizationofInvestmentPremiumsandDiscountsandQualifiedAffordableHousingProjectsInvestments	6880000	USD
CY2019	obnk	Depreciationand Amortization Excluding Amortizationof Investment Premiumsand Discountsand Qualified Affordable Housing Projects Investments DepreciationandAmortizationExcludingAmortizationofInvestmentPremiumsandDiscountsandQualifiedAffordableHousingProjectsInvestments	6706000	USD
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-7758000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4581000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-975000	USD
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1825000	USD
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1442000	USD
CY2019	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1608000	USD
CY2021	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	1748000	USD
CY2020	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	580000	USD
CY2019	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	20000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6279000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-11884000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2596000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	2295000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	2320000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	2247000	USD
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	478325000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	659188000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	353090000	USD
CY2021	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	542638000	USD
CY2020	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	570349000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	334958000	USD
CY2021	obnk	Gainon Saleof Loans Including Servicing Rights Origination GainonSaleofLoansIncludingServicingRightsOrigination	17015000	USD
CY2020	obnk	Gainon Saleof Loans Including Servicing Rights Origination GainonSaleofLoansIncludingServicingRightsOrigination	19190000	USD
CY2019	obnk	Gainon Saleof Loans Including Servicing Rights Origination GainonSaleofLoansIncludingServicingRightsOrigination	6943000	USD
CY2021	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	2593000	USD
CY2020	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	12746000	USD
CY2019	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	7012000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-82000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-72000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-139000	USD
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	810000	USD
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	917000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	755000	USD
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	19000	USD
CY2020	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	367000	USD
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-103000	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1141000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-194000	USD
CY2021	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	5213000	USD
CY2020	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
CY2019	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-6431000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	3142000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8035000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	171485000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	887000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	61553000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	415000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	7457000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	717028000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	700319000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	94544000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	146941000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	151932000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	154473000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	44893000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	64702000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	27766000	USD
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	10000000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	10000000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	15250000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	541000	USD
CY2021	obnk	Proceedsfrom Maturities Repaymentsand Callsof Equity Securities Fvni ProceedsfromMaturitiesRepaymentsandCallsofEquitySecuritiesFVNI	3243000	USD
CY2020	obnk	Proceedsfrom Maturities Repaymentsand Callsof Equity Securities Fvni ProceedsfromMaturitiesRepaymentsandCallsofEquitySecuritiesFVNI	452000	USD
CY2019	obnk	Proceedsfrom Maturities Repaymentsand Callsof Equity Securities Fvni ProceedsfromMaturitiesRepaymentsandCallsofEquitySecuritiesFVNI	434000	USD
CY2021	obnk	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	-17583000	USD
CY2020	obnk	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	22401000	USD
CY2019	obnk	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	-3386000	USD
CY2021	obnk	Paymentsfor Warehouse Purchase Program Loan Heldfor Investment PaymentsforWarehousePurchaseProgramLoanHeldforInvestment	16121464000	USD
CY2020	obnk	Paymentsfor Warehouse Purchase Program Loan Heldfor Investment PaymentsforWarehousePurchaseProgramLoanHeldforInvestment	13665295000	USD
CY2019	obnk	Paymentsfor Warehouse Purchase Program Loan Heldfor Investment PaymentsforWarehousePurchaseProgramLoanHeldforInvestment	4306171000	USD
CY2021	obnk	Proceedsfrom Warehouse Purchase Program Loan Heldfor Investment ProceedsfromWarehousePurchaseProgramLoanHeldforInvestment	16578387000	USD
CY2020	obnk	Proceedsfrom Warehouse Purchase Program Loan Heldfor Investment ProceedsfromWarehousePurchaseProgramLoanHeldforInvestment	12855955000	USD
CY2019	obnk	Proceedsfrom Warehouse Purchase Program Loan Heldfor Investment ProceedsfromWarehousePurchaseProgramLoanHeldforInvestment	4239381000	USD
CY2021	us-gaap	Proceeds From Sale And Collection Of Finance Receivables ProceedsFromSaleAndCollectionOfFinanceReceivables	55020000	USD
CY2020	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	788719000	USD
CY2019	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	290278000	USD
CY2021	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	-11000	USD
CY2020	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	0	USD
CY2019	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	4500000	USD
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	818000	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	503000	USD
CY2021	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	225000	USD
CY2020	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	525000	USD
CY2019	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	1521000	USD
CY2021	obnk	Payment To Acquire Low Income Housing Tax Credit Investments PaymentToAcquireLowIncomeHousingTaxCreditInvestments	1254000	USD
CY2020	obnk	Payment To Acquire Low Income Housing Tax Credit Investments PaymentToAcquireLowIncomeHousingTaxCreditInvestments	0	USD
CY2019	obnk	Payment To Acquire Low Income Housing Tax Credit Investments PaymentToAcquireLowIncomeHousingTaxCreditInvestments	0	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5015000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7198000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11152000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	18000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	27000	USD
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	3949000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	4451000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	470000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	12852000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2115732000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-291185000	USD
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	819378000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1522703000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	445474000	USD
CY2021	obnk	Proceedsfrom Fhl Bank Borrowings Long Term Advances Financing Activities ProceedsfromFHLBankBorrowingsLongTermAdvancesFinancingActivities	0	USD
CY2020	obnk	Proceedsfrom Fhl Bank Borrowings Long Term Advances Financing Activities ProceedsfromFHLBankBorrowingsLongTermAdvancesFinancingActivities	0	USD
CY2019	obnk	Proceedsfrom Fhl Bank Borrowings Long Term Advances Financing Activities ProceedsfromFHLBankBorrowingsLongTermAdvancesFinancingActivities	100000000	USD
CY2021	obnk	Payments Of Fhl Bank Borrowings Long Term Advances Financing Activities PaymentsOfFHLBankBorrowingsLongTermAdvancesFinancingActivities	13716000	USD
CY2020	obnk	Payments Of Fhl Bank Borrowings Long Term Advances Financing Activities PaymentsOfFHLBankBorrowingsLongTermAdvancesFinancingActivities	1898000	USD
CY2019	obnk	Payments Of Fhl Bank Borrowings Long Term Advances Financing Activities PaymentsOfFHLBankBorrowingsLongTermAdvancesFinancingActivities	101649000	USD
CY2021	obnk	Proceeds From Federal Reserve Bank Paycheck Protection Program Liquidity Facility ProceedsFromFederalReserveBankPaycheckProtectionProgramLiquidityFacility	0	USD
CY2020	obnk	Proceeds From Federal Reserve Bank Paycheck Protection Program Liquidity Facility ProceedsFromFederalReserveBankPaycheckProtectionProgramLiquidityFacility	319257000	USD
CY2019	obnk	Proceeds From Federal Reserve Bank Paycheck Protection Program Liquidity Facility ProceedsFromFederalReserveBankPaycheckProtectionProgramLiquidityFacility	0	USD
CY2021	obnk	Payments Of Federal Reserve Bank Paycheck Protection Program Liquidity Facility PaymentsOfFederalReserveBankPaycheckProtectionProgramLiquidityFacility	0	USD
CY2020	obnk	Payments Of Federal Reserve Bank Paycheck Protection Program Liquidity Facility PaymentsOfFederalReserveBankPaycheckProtectionProgramLiquidityFacility	319257000	USD
CY2019	obnk	Payments Of Federal Reserve Bank Paycheck Protection Program Liquidity Facility PaymentsOfFederalReserveBankPaycheckProtectionProgramLiquidityFacility	0	USD
CY2021	obnk	Proceedsfrom Fhl Bank Borrowings Short Term Advances Financing Activities ProceedsfromFHLBankBorrowingsShortTermAdvancesFinancingActivities	5726000000	USD
CY2020	obnk	Proceedsfrom Fhl Bank Borrowings Short Term Advances Financing Activities ProceedsfromFHLBankBorrowingsShortTermAdvancesFinancingActivities	2107000000	USD
CY2019	obnk	Proceedsfrom Fhl Bank Borrowings Short Term Advances Financing Activities ProceedsfromFHLBankBorrowingsShortTermAdvancesFinancingActivities	2815000000	USD
CY2021	obnk	Payments Of Fhl Bank Borrowings Short Term Advances Financing Activities PaymentsOfFHLBankBorrowingsShortTermAdvancesFinancingActivities	6376000000	USD
CY2020	obnk	Payments Of Fhl Bank Borrowings Short Term Advances Financing Activities PaymentsOfFHLBankBorrowingsShortTermAdvancesFinancingActivities	1557000000	USD
CY2019	obnk	Payments Of Fhl Bank Borrowings Short Term Advances Financing Activities PaymentsOfFHLBankBorrowingsShortTermAdvancesFinancingActivities	2815000000	USD
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	147374000	USD
CY2019	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	1039000	USD
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-8309000	USD
CY2019	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-23597000	USD
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	11525000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	8854000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	5863000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	146000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	248000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	166000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1256000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	723000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10059000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	144066000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2200541000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	404472000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	328403000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	85696000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	174840000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	377214000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	291518000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	116678000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	705617000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	377214000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	291518000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	26265000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	36432000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	53227000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	21164000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	24974000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	10023000	USD
CY2021	obnk	Unsettled Liability For Investment Purchases Recorded At Trade Date UnsettledLiabilityForInvestmentPurchasesRecordedAtTradeDate	8191000	USD
CY2020	obnk	Unsettled Liability For Investment Purchases Recorded At Trade Date UnsettledLiabilityForInvestmentPurchasesRecordedAtTradeDate	1514000	USD
CY2019	obnk	Unsettled Liability For Investment Purchases Recorded At Trade Date UnsettledLiabilityForInvestmentPurchasesRecordedAtTradeDate	2659000	USD
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	3889000	USD
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	2446000	USD
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1577000	USD
CY2021Q4	us-gaap	Number Of Stores NumberOfStores	44	banking_center
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassifications</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. Certain amounts previously reported have been reclassified to conform to the current presentation. Such reclassifications had no effect on prior year net income or stockholders' equity.</span>
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions based on available information that affect the amounts reported in the financial statements and disclosures provided, including the accompanying notes, and actual results could differ. Material estimates that are particularly susceptible to change include the allowance for credit losses for loans and available for sale securities; fair value measurements of assets and liabilities; and income taxes. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the Company's consolidated financial statements in the period they are deemed necessary. While management uses its best judgment, actual results could differ from those estimates.</span>
CY2021Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	15700000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	12100000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="margin-bottom:9pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Allowance for Credit Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. The allowance for loan credit losses represents the estimated losses for financial assets accounted for on an amortized cost basis. Expected losses are calculated using relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The Company evaluates loans held for investment ("LHFI") on a pool basis with pools of loans characterized by loan type, collateral, industry, internal credit risk rating and Fair Isaac Corporation ("FICO") score. The Company applied a probability of default, loss given default loss methodology to the loan pools at January 1 and December 31, 2021. Historical loss rates for each pool are calculated based on charge-off and recovery data beginning with the second quarter of 2012. These loss rates are adjusted for differences between current period conditions, including the ongoing effects of COVID-19 on the U.S. economy, and the conditions existing during the historical loss period. Historical losses are additionally adjusted for the effects of certain economic variables forecast over a one-year period. Subsequent to the forecast effects, historical loss rates are used to estimate losses over the estimated remaining lives of the loans. The estimated remaining lives consist of the contractual lives, adjusted for estimated prepayments. Loans that exhibit characteristics different from their pool characteristics are evaluated on an individual basis. Certain of these loans are considered to be collateral dependent with the borrower experiencing financial difficulty. For these loans, the fair value of collateral practical expedient is elected whereby the allowance is calculated as the amount by which the amortized cost exceeds the fair value of collateral, less costs to sell (if applicable). Those individual loans that are not collateral dependent are evaluated based on a discounted cash flow methodology. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. Loans are charged off against the allowance for credit losses when management believes the loss is confirmed. Subsequent recoveries, if any, are credited to the allowance.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Delinquency statistics are updated at least monthly and are the most meaningful indicator of the credit quality of one-to-four single-family residential, home equity loans and lines of credit and other consumer loans. Internal risk ratings are considered the most meaningful indicator of credit quality for commercial and industrial, construction, and commercial real estate loans. Internal risk ratings are a key factor in identifying loans that are individually evaluated for impairment and impact management's estimates of loss factors used in determining the amount of the allowance for credit losses. Internal risk ratings are updated on a regular basis.</span></div><div style="margin-bottom:9pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Troubled debt restructurings ("TDRs") are loans for which the contractual terms on the loan have been modified and both of the following conditions exist: (1) the borrower is experiencing financial difficulty and (2) the restructuring constitutes a concession. Concessions could include a reduction in the interest rate on the loan, payment extensions, forgiveness of principal, forbearance or other actions intended to maximize collection. The Company assesses all loan modifications to determine whether they constitute a TDR.</span></div><div style="margin-bottom:9pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance for off-balance sheet exposures was determined using the same methodology that is applied to LHFI. Utilization rates are determined based on historical usage.</span></div><div style="margin-bottom:9pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Credit losses related to available for sale debt securities are recorded through an allowance for credit losses. The amount of the allowance for credit losses is limited to the amount by which fair value is below amortized cost. Discounted cash flow analysis is required for determining credit losses for available for sale securities. In determining whether or not a credit loss exists, such factors as extent of the loss, adverse conditions related to the entity, industry or geographic region, security structure, ratings and changes by a rating agency and past performance are considered. The length of time a security has been in an unrealized loss position is not a factor in determining whether a credit loss exists.</span></div><div style="margin-bottom:9pt;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance for credit losses for held-to-maturity securities is calculated using a probability of default, loss given default methodology. Credit losses are estimated over the lives of the securities using historical loss rates, adjusted for current conditions and reasonable and supportable forecasts. Third-party data is used for the historical loss rates and probability of default statistics. The forecast effect is applied over the estimated lives of the securities.</span></div>
CY2021Q4	us-gaap	Other Real Estate OtherRealEstate	1500000	USD
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	1600000	USD
CY2021	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2019	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2020	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2021Q4	us-gaap	Other Investments OtherInvestments	21400000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	15700000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	37520000	USD
CY2019Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	1810000	USD
CY2019Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	108546000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	36357000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	53882000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23431504	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23367221	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23470746	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	177082	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	144731	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	203319	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23608586	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23511952	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23674065	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.63
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.56
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.30
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.60
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.55
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.28
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1497458000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	21896000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	14626000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1504728000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	USD
CY2021Q4	obnk	Debt Securities Available For Sale Net Of Allowance For Credit Loss DebtSecuritiesAvailableForSaleNetOfAllowanceForCreditLoss	1504728000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	971595000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	33972000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	893000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1004674000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	USD
CY2020Q4	obnk	Debt Securities Available For Sale Net Of Allowance For Credit Loss DebtSecuritiesAvailableForSaleNetOfAllowanceForCreditLoss	1004674000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	801669000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	12783000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	59519000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1843000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	861188000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	14626000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	119581000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	888000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	568000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	5000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	120149000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	893000	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	66000	USD
CY2019Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	0	USD
CY2021	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Recovery DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery	-101000	USD
CY2020	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Recovery DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery	30000	USD
CY2021Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	167000	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	66000	USD
CY2021Q4	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	6100000	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	5400000	USD
CY2021Q4	us-gaap	Debt Securities Held To Maturity Nonaccrual DebtSecuritiesHeldToMaturityNonaccrual	0	USD
CY2020Q4	us-gaap	Debt Securities Held To Maturity Nonaccrual DebtSecuritiesHeldToMaturityNonaccrual	0	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	44893000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	64702000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	27766000	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1780000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	774000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	161000	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	32000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	194000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	141000	USD
CY2021Q4	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	0	USD
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	5618000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	5623000	USD
CY2021Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	0	USD
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	0	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	117609000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	120398000	USD
CY2021Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	22934000	USD
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	25117000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	153260000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	155903000	USD
CY2021Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	0	USD
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	0	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	296949000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	304286000	USD
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	22934000	USD
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	25117000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1497458000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1504728000	USD
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	80387000	USD
CY2020Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	191512000	USD
CY2021Q4	obnk	Financing Receivable Excluding Loans At Fair Value Before Allowancefor Credit Loss FinancingReceivableExcludingLoansAtFairValueBeforeAllowanceforCreditLoss	5231331000	USD
CY2020Q4	obnk	Financing Receivable Excluding Loans At Fair Value Before Allowancefor Credit Loss FinancingReceivableExcludingLoansAtFairValueBeforeAllowanceforCreditLoss	5707762000	USD
CY2021Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	0	USD
CY2020Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	17011000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	5231331000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	5724773000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	64586000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	86670000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	5166745000	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	5638103000	USD
CY2021Q4	us-gaap	Financing Receivable Deferred Income FinancingReceivableDeferredIncome	9600000	USD
CY2020Q4	us-gaap	Financing Receivable Deferred Income FinancingReceivableDeferredIncome	13700000	USD
CY2020Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	17000000	USD
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	5231331000	USD
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2020Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	5724773000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2021Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	15900000	USD
CY2020Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	20300000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	86670000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	12234000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	948000	USD
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-10798000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	64586000	USD
CY2021	us-gaap	Financing Receivables Before Allowance For Credit Loss Average Amount Outstanding FinancingReceivablesBeforeAllowanceForCreditLossAverageAmountOutstanding	5343976000	USD
CY2021	srt	Financing Receivable Writeoff After Recovery To Average Outstanding Percent FinancingReceivableWriteoffAfterRecoveryToAverageOutstandingPercent	0.0021
CY2021	obnk	Credit Loss Expense Reversal CreditLossExpenseReversal	-10800000	USD
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-10800000	USD
CY2021	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	68000	USD
CY2021	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	101000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	37520000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	12394000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1268000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	59028000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	86670000	USD
CY2020	us-gaap	Financing Receivables Before Allowance For Credit Loss Average Amount Outstanding FinancingReceivablesBeforeAllowanceForCreditLossAverageAmountOutstanding	4950545000	USD
CY2020	srt	Financing Receivable Writeoff After Recovery To Average Outstanding Percent FinancingReceivableWriteoffAfterRecoveryToAverageOutstandingPercent	0.0022
CY2020	obnk	Credit Loss Expense Reversal CreditLossExpenseReversal	59900000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	59000000	USD
CY2020	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	902000	USD
CY2020	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	30000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	34203000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	10131000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	4241000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	9207000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	37520000	USD
CY2019	us-gaap	Financing Receivables Before Allowance For Credit Loss Average Amount Outstanding FinancingReceivablesBeforeAllowanceForCreditLossAverageAmountOutstanding	3972861000	USD
CY2019	srt	Financing Receivable Writeoff After Recovery To Average Outstanding Percent FinancingReceivableWriteoffAfterRecoveryToAverageOutstandingPercent	0.0015
CY2019	obnk	Credit Loss Expense Reversal CreditLossExpenseReversal	9600000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	9200000	USD
CY2019	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	361000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	-25100000	USD
CY2021Q4	obnk	Financing Receivable Allowance For Credit Loss Increase Decrease Related To Qualitative Factor Changes FinancingReceivableAllowanceForCreditLossIncreaseDecreaseRelatedToQualitativeFactorChanges	-19600000	USD
CY2020	obnk	Financing Receivable Coronavirus Pandemic Credit Loss Expense Reversal FinancingReceivableCoronavirusPandemicCreditLossExpenseReversal	39800000	USD
CY2020	obnk	Financing Receivable Coronavirus Pandemic Credit Loss Related To Factor Changes Expense Reversal FinancingReceivableCoronavirusPandemicCreditLossRelatedToFactorChangesExpenseReversal	27500000	USD
CY2020Q4	obnk	Financing Receivable Coronavirus Pandemic Allowance For Credit Losses Individually Evaluated For Impairment FinancingReceivableCoronavirusPandemicAllowanceForCreditLossesIndividuallyEvaluatedForImpairment	8100000	USD
CY2020	obnk	Financing Receivable Number Of Write Offs FinancingReceivableNumberOfWriteOffs	4	loan
CY2020	obnk	Financing Receivable Coronavirus Pandemic Allowance For Credit Loss Writeoff FinancingReceivableCoronavirusPandemicAllowanceForCreditLossWriteoff	6600000	USD
CY2021Q4	obnk	Financing Receivable Excluding Loans At Fair Value Before Allowancefor Credit Loss FinancingReceivableExcludingLoansAtFairValueBeforeAllowanceforCreditLoss	5231331000	USD
CY2020Q4	obnk	Financing Receivable Excluding Loans At Fair Value Before Allowancefor Credit Loss FinancingReceivableExcludingLoansAtFairValueBeforeAllowanceforCreditLoss	5707762000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	64586000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	86670000	USD
CY2021Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	8247000	USD
CY2020Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	4890000	USD
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	24903000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	26149000	USD
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1800000	USD
CY2020Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	681000	USD
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	6827000	USD
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	8985000	USD
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loan
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loan
CY2019	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	loan
CY2020	us-gaap	Depreciation Depreciation	5800000	USD
CY2021Q4	obnk	Fair Value Option Aggregate Fair Value FairValueOptionAggregateFairValue	44529000	USD
CY2021Q4	obnk	Fair Value Option Aggregate Unpaid Principal Balance FairValueOptionAggregateUnpaidPrincipalBalance	43447000	USD
CY2021Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1082000	USD
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1800000	USD
CY2020Q4	obnk	Fair Value Option Aggregate Fair Value FairValueOptionAggregateFairValue	164591000	USD
CY2020Q4	obnk	Fair Value Option Aggregate Unpaid Principal Balance FairValueOptionAggregateUnpaidPrincipalBalance	157333000	USD
CY2020Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	7258000	USD
CY2020Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	681000	USD
CY2020Q4	us-gaap	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus	0	USD
CY2021Q4	us-gaap	Fair Value Option Loans Held As Assets Aggregate Amount In Nonaccrual Status FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus	0	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	45200000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	62600000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossCumulativeAmount	0	USD
CY2021Q4	obnk	Liabilityto Repurchase Nonconforming Gnma Loans LiabilitytoRepurchaseNonconformingGNMALoans	43400000	USD
CY2020Q4	obnk	Liabilityto Repurchase Nonconforming Gnma Loans LiabilitytoRepurchaseNonconformingGNMALoans	55500000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	135008000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	131564000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	54317000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	49801000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	80691000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	81763000	USD
CY2021	us-gaap	Depreciation Depreciation	6000000	USD
CY2019	us-gaap	Depreciation Depreciation	5400000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	23732000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21667000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25691000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23445000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2852000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3148000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y5M19D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y2M19D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0289
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0344
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	4553000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	4680000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	4716000	USD
CY2021	obnk	Lease Other Cost LeaseOtherCost	369000	USD
CY2020	obnk	Lease Other Cost LeaseOtherCost	265000	USD
CY2019	obnk	Lease Other Cost LeaseOtherCost	245000	USD
CY2021	us-gaap	Lease Cost LeaseCost	4922000	USD
CY2020	us-gaap	Lease Cost LeaseCost	4945000	USD
CY2019	us-gaap	Lease Cost LeaseCost	4961000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5776000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1338000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1256000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	34368000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1467000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5035000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4530000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3336000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2666000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2385000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	11820000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	29772000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4081000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25691000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	4890000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	4791000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	34368000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	57185000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5855000	USD
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	51330000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	26741000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	26741000	USD
CY2020Q4	obnk	Intangible Assets Gross Including Goodwill IntangibleAssetsGrossIncludingGoodwill	35761000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5281000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	30480000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	844000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1100000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1300000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2072000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1971000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1610000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1327000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	8515000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	16962000	USD
CY2021	obnk	Mortgage Banking Revenue Origination MortgageBankingRevenueOrigination	1379000	USD
CY2020	obnk	Mortgage Banking Revenue Origination MortgageBankingRevenueOrigination	1880000	USD
CY2019	obnk	Mortgage Banking Revenue Origination MortgageBankingRevenueOrigination	1000000	USD
CY2021	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	11862000	USD
CY2020	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	13481000	USD
CY2019	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	4348000	USD
CY2021	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	5153000	USD
CY2020	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	5709000	USD
CY2019	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	2595000	USD
CY2021	obnk	Servicing Fees Net1 ServicingFeesNet1	5990000	USD
CY2020	obnk	Servicing Fees Net1 ServicingFeesNet1	6116000	USD
CY2019	obnk	Servicing Fees Net1 ServicingFeesNet1	6547000	USD
CY2021	obnk	Gross Mortgage Revenue GrossMortgageRevenue	24384000	USD
CY2020	obnk	Gross Mortgage Revenue GrossMortgageRevenue	27186000	USD
CY2019	obnk	Gross Mortgage Revenue GrossMortgageRevenue	14490000	USD
CY2021	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-2593000	USD
CY2020	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-12746000	USD
CY2019	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-7012000	USD
CY2021	obnk	Mortgage Servicing Rightand Hedge Fair Value Adjustment MortgageServicingRightandHedgeFairValueAdjustment	-6897000	USD
CY2020	obnk	Mortgage Servicing Rightand Hedge Fair Value Adjustment MortgageServicingRightandHedgeFairValueAdjustment	7351000	USD
CY2019	obnk	Mortgage Servicing Rightand Hedge Fair Value Adjustment MortgageServicingRightandHedgeFairValueAdjustment	979000	USD
CY2021	obnk	Mortgage Servicing Right Hedge Impact MortgageServicingRightHedgeImpact	-1967000	USD
CY2020	obnk	Mortgage Servicing Right Hedge Impact MortgageServicingRightHedgeImpact	7812000	USD
CY2019	obnk	Mortgage Servicing Right Hedge Impact MortgageServicingRightHedgeImpact	3852000	USD
CY2021	obnk	Mortgage Banking Revenue MortgageBankingRevenue	12927000	USD
CY2020	obnk	Mortgage Banking Revenue MortgageBankingRevenue	29603000	USD
CY2019	obnk	Mortgage Banking Revenue MortgageBankingRevenue	12309000	USD
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	13660000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	20697000	USD
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	25114000	USD
CY2021	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	5153000	USD
CY2020	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	5709000	USD
CY2019	obnk	Mortgage Banking Revenue Originations Of Mortgage Servicing Rights MortgageBankingRevenueOriginationsOfMortgageServicingRights	2595000	USD
CY2021	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-2593000	USD
CY2020	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-12746000	USD
CY2019	obnk	Mortgage Servicing Rights Valuation Adjustment Net Of Amortization MortgageServicingRightsValuationAdjustmentNetOfAmortization	-7012000	USD
CY2021Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	16220000	USD
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	13660000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	20697000	USD
CY2021	obnk	Servicing Fee Income Rate ServicingFeeIncomeRate	0.0028
CY2021Q4	obnk	Mortgage Loan Servicing Putback Expenses Reserve MortgageLoanServicingPutbackExpensesReserve	379000	USD
CY2020Q4	obnk	Mortgage Loan Servicing Putback Expenses Reserve MortgageLoanServicingPutbackExpensesReserve	311000	USD
CY2021Q4	obnk	Liabilityto Repurchase Nonconforming Gnma Loans LiabilitytoRepurchaseNonconformingGNMALoans	43400000	USD
CY2020Q4	obnk	Liabilityto Repurchase Nonconforming Gnma Loans LiabilitytoRepurchaseNonconformingGNMALoans	55500000	USD
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2163507000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1607564000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1412089000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1478818000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	2204109000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1794915000	USD
CY2021Q4	us-gaap	Time Deposits TimeDeposits	543128000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	664766000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	247860000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	205252000	USD
CY2021Q4	us-gaap	Deposits Deposits	6570693000	USD
CY2020Q4	us-gaap	Deposits Deposits	5751315000	USD
CY2021Q4	obnk	Deposits Municipal DepositsMunicipal	814800000	USD
CY2020Q4	obnk	Deposits Municipal DepositsMunicipal	689300000	USD
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	222700000	USD
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	271300000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	427558000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	65602000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	34370000	USD
CY2021Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	16500000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	7841000	USD
CY2021Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	7246000	USD
CY2021Q4	obnk	Time Deposit Maturities Year Six TimeDepositMaturitiesYearSix	511000	USD
CY2021Q4	us-gaap	Time Deposits TimeDeposits	543128000	USD
CY2021Q4	us-gaap	Bank Overdrafts BankOverdrafts	1900000	USD
CY2020Q4	us-gaap	Bank Overdrafts BankOverdrafts	462000	USD
CY2021Q4	obnk	Federal Home Loan Bank Advances And Securities Sold Under Agreements To Repurchase FederalHomeLoanBankAdvancesAndSecuritiesSoldUnderAgreementsToRepurchase	309801000	USD
CY2020Q4	obnk	Federal Home Loan Bank Advances And Securities Sold Under Agreements To Repurchase FederalHomeLoanBankAdvancesAndSecuritiesSoldUnderAgreementsToRepurchase	984608000	USD
CY2021Q4	obnk	Debt Instrument Number Of Grantor Trusts DebtInstrumentNumberOfGrantorTrusts	2	trust
CY2021Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	874766000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	1030766000	USD
CY2021Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	68000	USD
CY2020Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	1380000	USD
CY2020Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	22200000	USD
CY2021	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	0	shares
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2295000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2320000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2247000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	482000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	487000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	472000	USD
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P20Y
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.25
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	224000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	274000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.38
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y9M
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6493000	USD
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	20000	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.25
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	254000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.55
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y9M21D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6932000	USD
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	30000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.86
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y11M1D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	3789000	USD
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	184800	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.88
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	39200	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.73
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y3M10D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1262000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	39200	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	10.73
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y3M10D
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1262000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2100000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1800000	USD
CY2021Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	10400000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	11300000	USD
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1100000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1900000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1200000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17022000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18157000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	14232000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6077000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-11545000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2513000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	584000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1723000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1030000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	202000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-339000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-83000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23885000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7996000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12666000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	27811000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9314000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13975000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1339000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0101
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	878000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0198
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	644000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.0097
CY2021	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortization	468000	USD
CY2021	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization Percent EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortizationPercent	0.0035
CY2020	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortization	511000	USD
CY2020	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization Percent EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortizationPercent	0.0115
CY2019	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortization	514000	USD
CY2019	obnk	Effective Income Tax Rate Reconciliation Tax Credit Low Income Housing Net Of Amortization Percent EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingNetOfAmortizationPercent	0.0077
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1218000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.0092
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1218000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.0275
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1218000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.0183
CY2021	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncome	-170000	USD
CY2021	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income Percent EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncomePercent	-0.0013
CY2020	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncome	-259000	USD
CY2020	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income Percent EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncomePercent	-0.0058
CY2019	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncome	-158000	USD
CY2019	obnk	Effective Income Tax Reconciliation Tax Exempt Income Bank Owned Life Insurance Income Percent EffectiveIncomeTaxReconciliationTaxExemptIncomeBankOwnedLifeInsuranceIncomePercent	-0.0024
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	662000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0050
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1033000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0235
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	730000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0110
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1272000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.0096
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	181000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.0041
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-100000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.0015
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	106000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.0008
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	257000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.0058
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	413000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.0062
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-227000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0017
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	77000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0016
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	182000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0027
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23885000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1804
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7996000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12666000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1903
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	14565000	USD
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CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	4795000	USD
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CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1170000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1240000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	278000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1064000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	20808000	USD
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CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	974000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	994000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	19834000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	25129000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2461000	USD
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CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	127000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	118000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	3504000	USD
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CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	19316000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-19920000	USD
CY2021	obnk	Benefit To Common Equity Tier1 Capital Risk Weighted Assets Capital Ratio BenefitToCommonEquityTier1CapitalRiskWeightedAssetsCapitalRatio	0.0014
CY2021Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	37568	shares
CY2021Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	33.42
CY2021Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1300000	USD
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
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CY2021Q4	obnk	Fair Value Disclosure Off Balance Sheet Risks Amount Liability Greater Than Five Years FairValueDisclosureOffBalanceSheetRisksAmountLiabilityGreaterThanFiveYears	56525000	USD
CY2021Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	1670367000	USD
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CY2020Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	1384412000	USD
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	30000000	USD
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	30400000	USD

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2021 Q4 Form 10-K Financial Statement

#000151691222000031 Filed on February 23, 2022

Income Statement

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Facts In Submission

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$OBK Origin Bancorp Inc Stock $obk

2021 Q4 Form 10-K Financial Statement

#000151691222000031 Filed on February 23, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OBK
Origin Bancorp Inc Stock $obk