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BORROWINGS AND RELATED INTEREST (OFG’s Repurchase Agreements, Excluding Accrued Interest) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Securities sold under agreements to repurchase $ 0 $ 75,222
FNMA and FHLMC Certificates    
Debt Instrument [Line Items]    
Amortized Cost of Underlying Securities   81,409
Securities sold under agreements to repurchase   75,000
Approximate Fair Value of Underlying Securities   $ 80,968
Weighted Average Interest Rate of Security   5.25%
Securities Sold under Agreements to Repurchase    
Debt Instrument [Line Items]    
Accrued interest payable   $ 222
Securities sold under agreements to repurchase   0
Securities Sold under Agreements to Repurchase | Under 90 days    
Debt Instrument [Line Items]    
Securities sold under agreements to repurchase   75,000
Securities Sold under Agreements to Repurchase | Short-term Fixed-rate Repurchase Agreements    
Debt Instrument [Line Items]    
Securities sold under agreements to repurchase   $ 75,000
Weighted Average Interest Rate of Security   4.63%