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LOANS HELD FOR INVESTMENT - Collateral Dependent Loans Individually Evaluated For Purposes of Determining the ACL (Detail) - Collateral Pledged [Member] - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL $ 38,550 $ 40,448
Related Specific Allowance 3,654 3,820
Amortized Cost no ACL 76,290 81,063
Amortized Cost 114,840 121,511
Residential Portfolio Segment [Member] | Conventional Loan [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 34,257 36,206
Related Specific Allowance 2,410 2,571
Amortized Cost no ACL 152 0
Amortized Cost 34,409 36,206
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 1,789 1,513
Related Specific Allowance 347 322
Amortized Cost no ACL 13,331 17,590
Amortized Cost 15,120 19,103
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 2,449 2,466
Related Specific Allowance 896 897
Amortized Cost no ACL 61,851 62,453
Amortized Cost 64,300 64,919
Commercial Portfolio Segment [Member] | Construction Loans [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 0 0
Related Specific Allowance 0 0
Amortized Cost no ACL 956 956
Amortized Cost 956 956
Consumer Portfolio Segment [Member] | Personal Loans [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 55 56
Related Specific Allowance 1 1
Amortized Cost no ACL 0 64
Amortized Cost 55 120
Consumer Portfolio Segment [Member] | Other Loans [Member]    
Loans and Leases Receivable Disclosure [Line Items]    
Amortized Cost with ACL 0 207
Related Specific Allowance 0 29
Amortized Cost no ACL 0 0
Amortized Cost $ 0 $ 207