XML 57 R47.htm IDEA: XBRL DOCUMENT v3.23.1

Loans and Allowance for Credit Losses on Loans - Schedule of Allowance for Credit Losses on Loans and Recorded Investment by Portfolio Segment and Impairment Methodology (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	$ 293		$ 279
Allowance for Loan Collectively Evaluated for Impairment	20,521		18,962
Allowance for loan losses, Total	20,814	$ 21,165	19,241	$ 16,672	$ 16,123
Loans Individually Evaluated for Impairment	2,209		702
Loans Collectively Evaluated for Impairment	1,690,276		1,677,590
Total	1,692,485		1,678,292
Accrued interest receivable	6,400		6,400
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	0		0
Allowance for Loan Collectively Evaluated for Impairment	6,784		6,951
Allowance for loan losses, Total	6,784		6,951	6,480	8,150
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	833,615		842,208
Total	833,615		842,208
SBA—real estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	34		0
Allowance for Loan Collectively Evaluated for Impairment	1,184		1,607
Allowance for loan losses, Total	1,218		1,607	1,750	2,022
Loans Individually Evaluated for Impairment	806		423
Loans Collectively Evaluated for Impairment	224,913		220,917
Total	225,719		221,340
SBA—non-real estate
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	0		0
Allowance for Loan Collectively Evaluated for Impairment	67		207
Allowance for loan losses, Total	67	65	207	169	199
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	13,275		13,377
Total	13,275		13,377
C&I
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	259		279
Allowance for Loan Collectively Evaluated for Impairment	1,011		1,364
Allowance for loan losses, Total	1,270	1,323	1,643	3,492	2,848
Loans Individually Evaluated for Impairment	270		279
Loans Collectively Evaluated for Impairment	117,571		116,672
Total	117,841		116,951
Home mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	0		0
Allowance for Loan Collectively Evaluated for Impairment	11,472		8,826
Allowance for loan losses, Total	11,472	10,579	8,826	4,768	2,891
Loans Individually Evaluated for Impairment	1,133		0
Loans Collectively Evaluated for Impairment	499,502		482,949
Total	500,635		482,949
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loans Individually Evaluated for Impairment	0		0
Allowance for Loan Collectively Evaluated for Impairment	3		7
Allowance for loan losses, Total	3	$ 3	7	$ 13	$ 13
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	1,400		1,467
Total	$ 1,400		$ 1,467

X

- Definition

Amount, after allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3A
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267960-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL120267845-210446

+ Details

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

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

+ Details

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

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ 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

No definition available.

+ 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 collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447

+ Details

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

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ 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_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=opbk_HomeMortgagePortfolioMember
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: