XML 58 R48.htm IDEA: XBRL DOCUMENT
v3.23.1

Loans and Allowance for Credit Losses on Loans - Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | $ 1,692,485 | $ 1,678,292
Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 1,938 |
SBA—real estate |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 225,719 | 221,340
SBA—real estate | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 805 |
Home mortgage |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 500,635 | $ 482,949
Home mortgage | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 1,133 |
Hotel | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 424 |
Hotel | SBA—real estate | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 424 |
Hotel | Home mortgage | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 0 |
Single Family | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 1,133 |
Single Family | SBA—real estate | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 0 |
Single Family | Home mortgage | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 1,133 |
Retail Site | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 381 |
Retail Site | SBA—real estate | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | 381 |
Retail Site | Home mortgage | Collateralized Mortgage-Backed Securities |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |
Total | $ 0 |

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 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_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
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_HomeMortgagePortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_HotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_SingleFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |