LOANS HELD FOR INVESTMENT - Loan Modifications Considered Troubled Debt Restructurings Defaulted (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	153	175	220
Recorded investment | $	$ 2,406	$ 3,900	$ 4,501
Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	7	10	11
Recorded investment | $	$ 475	$ 2,380	$ 2,019
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	3	0
Recorded investment | $	$ 0	$ 124	$ 0
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
Construction Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	92	55	130
Recorded investment | $	$ 1,625	$ 947	$ 2,221
Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	1	1
Recorded investment | $	$ 0	$ 5	$ 14
Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	1	1	1
Recorded investment | $	$ 1	$ 7	$ 9
Credit Cards | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	42	47	0
Recorded investment | $	$ 260	$ 228	$ 0
Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	11	58	77
Recorded investment | $	$ 45	$ 209	$ 238
PR And VI [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	153	175	220
Recorded investment | $	$ 2,406	$ 3,900	$ 4,501
PR And VI [Member] | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	7	10	11
Recorded investment | $	$ 475	$ 2,380	$ 2,019
PR And VI [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	3	0
Recorded investment | $	$ 0	$ 124	$ 0
PR And VI [Member] | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
PR And VI [Member] | Construction Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
PR And VI [Member] | Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	92	55	130
Recorded investment | $	$ 1,625	$ 947	$ 2,221
PR And VI [Member] | Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	1	1
Recorded investment | $	$ 0	$ 5	$ 14
PR And VI [Member] | Personal Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	1	1	1
Recorded investment | $	$ 1	$ 7	$ 9
PR And VI [Member] | Credit Cards | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	42	47	0
Recorded investment | $	$ 260	$ 228	$ 0
PR And VI [Member] | Other Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	11	58	77
Recorded investment | $	$ 45	$ 209	$ 238
FL
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
FL | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
FL | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
FL | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
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
Recorded investment | $	$ 0	$ 0	$ 0
FL | Auto loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0
FL | Finance Leases [Member] | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
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
Recorded investment | $	$ 0	$ 0	$ 0
FL | Credit Cards | Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of contracts | numberofcontracts	0	0	0
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
Recorded investment | $	$ 0	$ 0	$ 0