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Significant Events (Details) $ in Millions	Jun. 30, 2019 USD ($)
Scotiabank Of Puerto Rico [Member]
Unusual Or Infrequent Item [Line Items]
Transaction costs reimbursement payable	$ 2

X

- References

No definition available.

+ Details

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Namespace Prefix:	ofg_
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_UnusualOrInfrequentItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ofg_ScotiaBankOfPuertoRicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: