SEGMENT INFORMATION - revenues and selected balance sheet data by geography based on the location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total revenues	$ 985,706	$ 915,872	$ 804,208
Total assets	18,634,484	20,785,275
Deposits	16,143,467	17,784,894
Brokered CDs	105,826	100,417
Puerto Rico [Member]
Segment Reporting Information [Line Items]
Total revenues	855,441	795,166	678,370
Total assets	16,020,987	18,175,910	16,091,112
Total gross loans held for investment portfolio	9,097,013	8,755,434	9,367,032
Deposits	12,933,570	14,113,874	12,338,934
Brokered CDs	1,400	34,200	109,000
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	97,642	86,157	88,799
Total assets	2,213,333	2,189,440	2,117,966
Total gross loans held for investment portfolio	2,088,351	1,948,716	1,993,797
Deposits	1,623,725	1,928,749	1,622,481
Brokered CDs	104,400	66,200	107,100
Virgin Islands [Member]
Segment Reporting Information [Line Items]
Total revenues	32,623	34,549	37,039
Total assets	400,164	419,925	583,993
Total gross loans held for investment portfolio	379,767	391,663	466,749
Deposits	$ 1,586,172	$ 1,742,271	$ 1,355,968