BORROWINGS AND RELATED INTEREST (OFG’s Repurchase Agreements, Excluding Accrued Interest) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Securities sold under agreements to repurchase	$ 27,463	$ 75,222
FNMA and FHLMC Certificates
Debt Instrument [Line Items]
Amortized Cost of Underlying Securities	28,726	81,409
Securities sold under agreements to repurchase	27,344	75,000
Approximate Fair Value of Underlying Securities	$ 28,946	$ 80,968
Weighted Average Interest Rate of Security	5.50%	5.25%
Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Accrued interest payable	$ 119	$ 222
Securities Sold under Agreements to Repurchase \| Under 90 days
Debt Instrument [Line Items]
Securities sold under agreements to repurchase	27,344	75,000
Securities Sold under Agreements to Repurchase \| Short-term Fixed-rate Repurchase Agreements
Debt Instrument [Line Items]
Securities sold under agreements to repurchase	$ 27,344	$ 75,000
Weighted Average Interest Rate of Security	4.50%	4.63%

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