CREDIT QUALITY ASSESSMENT - Collateral Dependent Loans Individually Evaluated for Credit Loss (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	$ 10,153	$ 9,510
Allowance related to loans evaluated individually	6,654	6,593
Loans individually evaluated for credit loss without an allowance	21,620	24,024
Total individually evaluated collateral dependent loans	31,773	33,534
Total unpaid contractual principal balance	36,280	38,399
Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	7,068	6,386
Loans individually evaluated for credit loss without an allowance	6,953	8,707
Total individually evaluated collateral dependent loans	14,021	15,093
Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	2,460	2,511
Loans individually evaluated for credit loss without an allowance	13,131	13,763
Total individually evaluated collateral dependent loans	15,591	16,274
Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	625	613
Loans individually evaluated for credit loss without an allowance	1,536	1,554
Total individually evaluated collateral dependent loans	2,161	2,167
Commercial real estate: | Commercial investor real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	889	1,144
Allowance related to loans evaluated individually	181	213
Loans individually evaluated for credit loss without an allowance	10,854	11,345
Total individually evaluated collateral dependent loans	11,743	12,489
Total unpaid contractual principal balance	12,290	12,857
Commercial real estate: | Commercial investor real estate | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	553	808
Loans individually evaluated for credit loss without an allowance	3,163	3,498
Total individually evaluated collateral dependent loans	3,716	4,306
Commercial real estate: | Commercial investor real estate | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	336	336
Loans individually evaluated for credit loss without an allowance	7,691	7,847
Total individually evaluated collateral dependent loans	8,027	8,183
Commercial real estate: | Commercial investor real estate | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Commercial real estate: | Commercial owner-occupied real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	491	79
Allowance related to loans evaluated individually	94	79
Loans individually evaluated for credit loss without an allowance	7,592	9,227
Total individually evaluated collateral dependent loans	8,083	9,306
Total unpaid contractual principal balance	9,925	11,132
Commercial real estate: | Commercial owner-occupied real estate | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	491	79
Loans individually evaluated for credit loss without an allowance	3,377	4,775
Total individually evaluated collateral dependent loans	3,868	4,854
Commercial real estate: | Commercial owner-occupied real estate | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	4,215	4,452
Total individually evaluated collateral dependent loans	4,215	4,452
Commercial real estate: | Commercial owner-occupied real estate | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Commercial real estate: | Commercial AD&C
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	1,081	650
Allowance related to loans evaluated individually	504	504
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	1,081	650
Total unpaid contractual principal balance	1,126	695
Commercial real estate: | Commercial AD&C | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	1,081	650
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	1,081	650
Commercial real estate: | Commercial AD&C | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Commercial real estate: | Commercial AD&C | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Commercial Business
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	7,692	7,637
Allowance related to loans evaluated individually	5,875	5,797
Loans individually evaluated for credit loss without an allowance	1,290	1,396
Total individually evaluated collateral dependent loans	8,982	9,033
Total unpaid contractual principal balance	10,593	10,573
Commercial Business | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	4,943	4,849
Loans individually evaluated for credit loss without an allowance	413	434
Total individually evaluated collateral dependent loans	5,356	5,283
Commercial Business | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	2,124	2,175
Loans individually evaluated for credit loss without an allowance	877	962
Total individually evaluated collateral dependent loans	3,001	3,137
Commercial Business | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	625	613
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	625	613
Residential real estate: | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Allowance related to loans evaluated individually	0	0
Loans individually evaluated for credit loss without an allowance	1,536	1,704
Total individually evaluated collateral dependent loans	1,536	1,704
Total unpaid contractual principal balance	1,982	2,778
Residential real estate: | Residential mortgage | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Residential real estate: | Residential mortgage | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	150
Total individually evaluated collateral dependent loans	0	150
Residential real estate: | Residential mortgage | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	1,536	1,554
Total individually evaluated collateral dependent loans	1,536	1,554
Residential real estate: | Residential construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Allowance related to loans evaluated individually	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Total unpaid contractual principal balance	0	0
Residential real estate: | Residential construction | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Residential real estate: | Residential construction | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Residential real estate: | Residential construction | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Allowance related to loans evaluated individually	0	0
Loans individually evaluated for credit loss without an allowance	348	352
Total individually evaluated collateral dependent loans	348	352
Total unpaid contractual principal balance	364	364
Consumer | Non-accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	0	0
Consumer | Non-accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	348	352
Total individually evaluated collateral dependent loans	348	352
Consumer | Accruing | Restructured
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans individually evaluated for credit loss with an allowance	0	0
Loans individually evaluated for credit loss without an allowance	0	0
Total individually evaluated collateral dependent loans	$ 0	$ 0