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Allowance for Loan and Lease Losses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity to Puerto Rico Government	$ 670.9	$ 763.4
Line Of Credit Facility Amount Outstanding to Puerto Rico Government	655.4	696.0
Total revolving line of credit granted to the Government of Puerto Rico	550
Unpaid principal balance of the revolving line of credit granted to the Government of Puerto Rico	$ 200.0
Government credit line maturity date	Aug. 14, 2014

X

- Definition

Maturity date of the revolving line of credit granted to the Government of Puerto Rico

+ References

No definition available.

+ Details

Name:	ofg_GovernmentCreditLineMaturityDate
Namespace Prefix:	ofg_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total of the unpaid principal balance of the line of credit granted to the Government by the institution.

+ References

No definition available.

+ Details

Name:	ofg_GovernmentCreditLineUnpaidPrincipalBalance
Namespace Prefix:	ofg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Total line of credit granted to the Government by the majority of the country's banks.

+ References

No definition available.

+ Details

Name:	ofg_TotalRevolvingLineOfCreditOfGovernment
Namespace Prefix:	ofg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant