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CASH RESTRICTIONS (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Restricted Cash and Investments [Abstract]
Reserve required by local government	$ 475.6	$ 472.0

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- 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

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- References

No definition available.

+ Details

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