| Document And Entity Information | Jul. 24, 2020 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 24, 2020 |
| Entity Registrant Name | OFG Bancorp |
| Entity Incorporation, State or Country Code | PR |
| Entity File Number | 001-12647 |
| Entity Tax Identification Number | 66-0538893 |
| Entity Address, Address Line One | Oriental Center, 15th Floor |
| Entity Address Address Line 2 | 254 Muñoz Rivera Avenue |
| Entity Address, City or Town | San Juan |
| Entity Address Country | PR |
| Entity Address, Postal Zip Code | 00918 |
| City Area Code | 787 |
| Local Phone Number | 771-6800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Central Index Key | 0001030469 |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
