XML 80 R66.htm IDEA: XBRL DOCUMENT v3.24.0.1

Loans - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	$ 5,011	$ 8,217
ALCL Allocation	0	738
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	377	1,116
ALCL Allocation	0	738
Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
ALCL Allocation	0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
ALCL Allocation	0	0
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	4,634	7,101
Real Estate | Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Real Estate | Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Accounts Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		831
Accounts Receivable | Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		831
Accounts Receivable | Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		0
Accounts Receivable | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		0
Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	119	285
Equipment | Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	119	285
Equipment | Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Equipment | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	258
Other | Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	258
Other | Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0
Other | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0
Commercial real estate | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	605	273
ALCL Allocation	0	0
Commercial real estate | Real Estate | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	605	273
Commercial real estate | Accounts Receivable | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		0
Commercial real estate | Equipment | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Commercial real estate | Other | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0
Construction/land/land development | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	97
ALCL Allocation	0	0
Construction/land/land development | Real Estate | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	97
Construction/land/land development | Accounts Receivable | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		0
Construction/land/land development | Equipment | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	0
Construction/land/land development | Other | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0
Residential Real Estate | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	4,029	6,731
ALCL Allocation	0	0
Residential Real Estate | Real Estate | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	4,029	6,731
Residential Real Estate | Accounts Receivable | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		0
Residential Real Estate | Equipment | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	0	$ 0
Residential Real Estate | Other | Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	$ 0

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (g)
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

+ Details

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=obnk_MortgageWarehousePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=us-gaap_RealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=us-gaap_EquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=obnk_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=obnk_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=obnk_ConstructionLandandLandDevelopmentLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: