LOANS HELD FOR INVESTMENT - Loan Modifications are Considered TDRs (Detail) - TDR $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) numberofcontracts	Dec. 31, 2020 USD ($) numberofcontracts	Dec. 31, 2019 USD ($) numberofcontracts
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	612	648	1,309
Pre-modification Outstanding Recorded Investment	$ 34,485	$ 37,140	$ 66,184
Post-Modification Outstanding Recorded Investment	$ 34,216	$ 36,319	$ 63,433
Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	66	103	118
Pre-modification Outstanding Recorded Investment	$ 7,687	$ 9,027	$ 14,606
Post-Modification Outstanding Recorded Investment	$ 7,594	$ 8,307	$ 14,084
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	6	14	14
Pre-modification Outstanding Recorded Investment	$ 10,031	$ 22,544	$ 1,754
Post-Modification Outstanding Recorded Investment	$ 9,908	$ 22,524	$ 1,750
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	7	5	13
Pre-modification Outstanding Recorded Investment	$ 11,285	$ 824	$ 40,988
Post-Modification Outstanding Recorded Investment	$ 11,223	$ 824	$ 38,750
Construction loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	4
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 118
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 117
Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	134	163	256
Pre-modification Outstanding Recorded Investment	$ 2,601	$ 2,635	$ 4,201
Post-Modification Outstanding Recorded Investment	$ 2,598	$ 2,623	$ 4,154
Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	42	29	42
Pre-modification Outstanding Recorded Investment	$ 692	$ 408	$ 804
Post-Modification Outstanding Recorded Investment	$ 697	$ 408	$ 801
Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	46	30	53
Pre-modification Outstanding Recorded Investment	$ 497	$ 306	$ 502
Post-Modification Outstanding Recorded Investment	$ 504	$ 305	$ 499
Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	246	159	153
Pre-modification Outstanding Recorded Investment	$ 1,426	$ 783	$ 800
Post-Modification Outstanding Recorded Investment	$ 1,426	$ 783	$ 800
Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	65	145	656
Pre-modification Outstanding Recorded Investment	$ 266	$ 613	$ 2,411
Post-Modification Outstanding Recorded Investment	$ 266	$ 545	$ 2,478
PR And VI [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	606	647	1,306
Pre-modification Outstanding Recorded Investment	$ 32,720	$ 37,117	$ 66,151
Post-Modification Outstanding Recorded Investment	$ 32,451	$ 36,296	$ 63,400
PR And VI [Member] | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	61	103	118
Pre-modification Outstanding Recorded Investment	$ 6,221	$ 9,027	$ 14,606
Post-Modification Outstanding Recorded Investment	$ 6,128	$ 8,307	$ 14,084
PR And VI [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	5	14	14
Pre-modification Outstanding Recorded Investment	$ 9,732	$ 22,544	$ 1,754
Post-Modification Outstanding Recorded Investment	$ 9,609	$ 22,524	$ 1,750
PR And VI [Member] | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	7	5	13
Pre-modification Outstanding Recorded Investment	$ 11,285	$ 824	$ 40,988
Post-Modification Outstanding Recorded Investment	$ 11,223	$ 824	$ 38,750
PR And VI [Member] | Construction loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	4
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 118
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 117
PR And VI [Member] | Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	134	163	253
Pre-modification Outstanding Recorded Investment	$ 2,601	$ 2,635	$ 4,168
Post-Modification Outstanding Recorded Investment	$ 2,598	$ 2,623	$ 4,121
PR And VI [Member] | Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	42	29	42
Pre-modification Outstanding Recorded Investment	$ 692	$ 408	$ 804
Post-Modification Outstanding Recorded Investment	$ 697	$ 408	$ 801
PR And VI [Member] | Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	46	30	53
Pre-modification Outstanding Recorded Investment	$ 497	$ 306	$ 502
Post-Modification Outstanding Recorded Investment	$ 504	$ 305	$ 499
PR And VI [Member] | Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	246	159	153
Pre-modification Outstanding Recorded Investment	$ 1,426	$ 783	$ 800
Post-Modification Outstanding Recorded Investment	$ 1,426	$ 783	$ 800
PR And VI [Member] | Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	65	144	656
Pre-modification Outstanding Recorded Investment	$ 266	$ 590	$ 2,411
Post-Modification Outstanding Recorded Investment	$ 266	$ 522	$ 2,478
FL
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	6	1	3
Pre-modification Outstanding Recorded Investment	$ 1,765	$ 23	$ 33
Post-Modification Outstanding Recorded Investment	$ 1,765	$ 23	$ 33
FL | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	5	0	0
Pre-modification Outstanding Recorded Investment	$ 1,466	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 1,466	$ 0	$ 0
FL | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	1	0	0
Pre-modification Outstanding Recorded Investment	$ 299	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 299	$ 0	$ 0
FL | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
FL | Construction loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
FL | Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	3
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 33
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 33
FL | Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
FL | Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
FL | Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0
FL | Credit Card Receivables [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	1	0
Pre-modification Outstanding Recorded Investment	$ 0	$ 23	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 23	$ 0