OFG Bancorp (Holding Company Only) Financial Information (Condensed Statement of Operations Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income:
Total income	$ 0	$ 0	$ 0
Expenses:
Interest expense	41,829	64,915	51,002
Total expenses	0	0	0
Net income	146,151	74,327	53,841
Parent Company
Income:
Interest income	55	86	828
Investment trading activities, net and other	6,765	6,583	5,308
Total income	6,820	6,669	6,136
Expenses:
Interest expense	1,174	1,394	2,012
Operating expenses	8,397	7,483	7,516
Total expenses	9,571	8,877	9,528
Loss before income taxes	(2,751)	(2,208)	(3,392)
Income tax expense (benefit)	1,813	(1,363)	1,705
Loss before changes in undistributed earnings of subsidiaries	(4,564)	(845)	(5,097)
Net income	146,151	74,327	53,841
Bank subsidiary
Expenses:
Net income	144,089	74,899	56,114
Nonbank subsidiaries
Expenses:
Net income	$ 6,626	$ 273	$ 2,824