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Allowance for Loan and Lease Losses (Narrative) (Details) $ in Millions | Jul. 01, 2017 USD ($)
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Financing Receivable, Recorded Investment [Line Items] |
Acquired Municipal Loans Scheduled Principal Payments | $ 5.2

X
- Definition Acquired government loan scheduled principal payments + References No definition available. + Details
Name: | ofg_AcquiredGovernmentLoanScheduledPrincipalPayments
Namespace Prefix: | ofg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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