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Commitments (Narratives) (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Commitments and Contingencies [Abstract] |  |
Rent Expenses | $ 2,100,000 | $ 2,400,000
Line of credit reserve | $ 667,000 | $ 667,000

X
- Definition Reserve for commitments to extend credit in case of future cash requirement. + References No definition available. + Details
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Namespace Prefix: | ofg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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