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BANKING AND FINANCIAL SERVICE REVENUES - Narrative (Details) $ in Billions	3 Months Ended
	Dec. 31, 2024 USD ($)
Banking and Thrift, Interest [Abstract]
Asset threshold	$ 10

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- Definition

Interchange Income And Service Charges, Asset Threshold

+ References

No definition available.

+ Details

Name:	ofg_InterchangeIncomeAndServiceChargesAssetThreshold
Namespace Prefix:	ofg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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