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OFG BANCORP Holding Company Only Financial Information (Statement of Comprehensive Income) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Legal Entity [Line Items]      
Net Income (Loss) Attributable to Parent $ 59,186 $ (2,504) $ 85,181
Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax (5,023) (8,814) 19,843
ParentMember      
Legal Entity [Line Items]      
Net Income (Loss) Attributable to Parent 59,186 (2,504) 85,181
Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax (204) (170) 209
Other comprehensive income (loss) from bank subsidiary (12,238) (5,578) 16,361
Other comprehensive income (loss) before taxes (12,442) (5,748) 16,570
Income tax effect 41 34 (50)
Other comprehensive income (loss) after taxes (12,401) (5,714) 16,520
Comprehensive income $ 46,785 $ (8,218) $ 101,701