CASH RESTRICTIONS (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Restricted Cash and Investments [Abstract]
Reserve required by local government	$ 467.4	$ 472.0

Cash deposited in a special reserve account for the exclusive benefit of government demand deposits pursuant to local Government Regulations

No definition available.

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