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Restricted Cash (Narrative) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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Restricted Cash And Investments Abstract |  |
Certificates Of Deposits Oriental International Banking and Oriental Overseas | $ 300 | $ 300
Reserve required by local Goverment | $ 148,900 | $ 141,500

X
- Definition Certificate of deposit free of liens to comply with established laws for international banking entities and regulations on the OCFI. + References No definition available. + Details
Name: | ofg_CertificatesofdepositsSubsidiary
Namespace Prefix: | ofg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash deposited in a special reserve account for the exclusive benefit of government demand deposits pursuant to local Government Regulations + References No definition available. + Details
Name: | ofg_ReserveRequiredByLocalGoverment
Namespace Prefix: | ofg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RestrictedCashAndInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration