OFG Bancorp (Holding Company Only) Financial Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsidiary Or Equity Method Investee [Line Items]
Dividends And Interest Paid	$ 26.1	$ 20.0	$ 37.7
Oriental Insurance [Member]
Subsidiary Or Equity Method Investee [Line Items]
Dividends And Interest Paid	$ 4.0	$ 6.0	$ 4.0

The contractual amount of dividends (or interest on participating income bonds) that must be paid for the current period (for example, unpaid cumulative dividends).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-URI http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256

Name:	us-gaap_DividendsAndInterestPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration