SEGMENT INFORMATION - revenues and selected balance sheet data by geography based on the location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 915,872	$ 804,208	$ 766,469
Total assets	20,785,275	18,793,071
Deposits	17,784,894	15,317,383
Brokered CDs	100,417	216,172
Puerto Rico [Member]
Segment Reporting Information [Line Items]
Total revenues	795,166	678,370	628,489
Total assets	18,175,910	16,091,112	10,059,890
Total gross loans held for investment portfolio	8,755,434	9,367,032	6,695,953
Deposits	14,113,874	12,338,934	6,422,864
Brokered CDs	34,200	109,000	243,400
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	86,157	88,799	100,213
Total assets	2,189,440	2,117,966	2,048,260
Total gross loans held for investment portfolio	1,948,716	1,993,797	1,879,346
Deposits	1,928,749	1,622,481	1,661,657
Brokered CDs	66,200	107,100	191,700
Virgin Islands [Member]
Segment Reporting Information [Line Items]
Total revenues	34,549	37,039	37,767
Total assets	419,925	583,993	503,116
Total gross loans held for investment portfolio	391,663	466,749	466,383
Deposits	$ 1,742,271	$ 1,355,968	$ 1,263,908