LOANS HELD FOR INVESTEMNT - Collateral Dependent Lons Individually Evaluated For Purposes of Determing the ACL (Detail) - Collateral Pledged [Member] $ in Thousands	Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	$ 154,276
Related Specific Allowance	14,071
Amortized Cost no ACL	92,527
Amortized Cost	246,803
Residential Portfolio Segment [Member] | Loans Insured or Guaranteed by US Government Authorities [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
Residential Portfolio Segment [Member] | Conventional Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	107,174
Related Specific Allowance	10,570
Amortized Cost no ACL	9,545
Amortized Cost	116,719
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	21,933
Related Specific Allowance	880
Amortized Cost no ACL	25,289
Amortized Cost	47,222
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	17,882
Related Specific Allowance	1,923
Amortized Cost no ACL	51,568
Amortized Cost	69,450
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	6,036
Related Specific Allowance	500
Amortized Cost no ACL	6,125
Amortized Cost	12,161
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
Consumer Portfolio Segment [Member] | Finance Leases [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
Consumer Portfolio Segment [Member] | Personal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	146
Related Specific Allowance	2
Amortized Cost no ACL	0
Amortized Cost	146
Consumer Portfolio Segment [Member] | Credit Card Receivables [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	1,105
Related Specific Allowance	196
Amortized Cost no ACL	0
Amortized Cost	1,105
PR And VI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	147,804
Related Specific Allowance	13,000
Amortized Cost no ACL	87,239
Amortized Cost	235,043
PR And VI [Member] | Residential Portfolio Segment [Member] | Loans Insured or Guaranteed by US Government Authorities [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
PR And VI [Member] | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	100,950
Related Specific Allowance	9,582
Amortized Cost no ACL	7,145
Amortized Cost	108,095
PR And VI [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	21,933
Related Specific Allowance	880
Amortized Cost no ACL	24,728
Amortized Cost	46,661
PR And VI [Member] | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	17,882
Related Specific Allowance	1,923
Amortized Cost no ACL	49,241
Amortized Cost	67,123
PR And VI [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	6,036
Related Specific Allowance	500
Amortized Cost no ACL	6,125
Amortized Cost	12,161
PR And VI [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
PR And VI [Member] | Consumer Portfolio Segment [Member] | Finance Leases [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
PR And VI [Member] | Consumer Portfolio Segment [Member] | Personal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	146
Related Specific Allowance	2
Amortized Cost no ACL	0
Amortized Cost	146
PR And VI [Member] | Consumer Portfolio Segment [Member] | Credit Card Receivables [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
PR And VI [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	857
Related Specific Allowance	113
Amortized Cost no ACL	0
Amortized Cost	857
FL
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	6,472
Related Specific Allowance	1,071
Amortized Cost no ACL	5,288
Amortized Cost	11,760
FL | Residential Portfolio Segment [Member] | Loans Insured or Guaranteed by US Government Authorities [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Residential Portfolio Segment [Member] | Conventional Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	6,224
Related Specific Allowance	988
Amortized Cost no ACL	2,400
Amortized Cost	8,624
FL | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	561
Amortized Cost	561
FL | Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	2,327
Amortized Cost	2,327
FL | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Consumer Portfolio Segment [Member] | Finance Leases [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Consumer Portfolio Segment [Member] | Personal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Consumer Portfolio Segment [Member] | Credit Card Receivables [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	0
Related Specific Allowance	0
Amortized Cost no ACL	0
Amortized Cost	0
FL | Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized Cost with ACL	248
Related Specific Allowance	83
Amortized Cost no ACL	0
Amortized Cost	$ 248