Allowance for Credit Losses - Summary of Aging Analysis of the Recorded Investment of Past-Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 1,754,291	$ 1,751,423
Loans receivable	2,245,461	2,241,359
Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	67,359	65,861
Loans receivable	67,359	65,861
Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	194,391	178,483
Loans receivable	194,391	178,483
Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	218,724	238,343
Loans receivable	218,724	238,343
Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	190,146	180,788
Loans receivable	190,146	180,788
Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	489,467	501,732
Loans receivable	489,467	501,732
Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	589,731	580,972
Loans receivable	589,731	580,972
First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	403,300	402,433
Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	71,060	70,747
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	4,473	5,244
Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,473	5,244
Loans receivable	16,810	16,756
30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,145	1,239
30-59 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	14
30-59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,300	10
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	245	46
30-59 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
30-59 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	625	156
30-59 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
30-59 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,629	719
30-59 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	315	279
30-59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	31	15
30-59 Days Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	11,150	3,451
60-89 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2,427	0
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	1
60-89 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,388	2,802
60-89 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,920	86
60-89 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,190	419
60-89 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	223	128
60-89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2	15
60-89 Days Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
90 Days or Greater Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,633	2,661
90 Days or Greater Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
90 Days or Greater Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	91	191
90 Days or Greater Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	86	118
90 Days or Greater Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
90 Days or Greater Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2,631	137
90 Days or Greater Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	352	1,239
90 Days or Greater Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,376	872
90 Days or Greater Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	97	97
90 Days or Greater Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	7
90 Days or Greater Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Total Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	19,928	7,351
Total Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	14
Total Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,818	201
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	331	165
Total Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Total Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	6,644	3,095
Total Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,272	1,325
Total Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,195	2,010
Total Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	635	504
Total Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	33	37
Total Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Current [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2,225,533	2,234,008
Loans receivable	2,245,461
Current [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	67,359	65,847
Current [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	190,573	178,282
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	218,393	238,178
Current [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	190,146	180,788
Current [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	482,823	498,637
Current [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	585,459	579,647
Current [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	399,105	400,423
Current [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	70,425	70,243
Current [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,440	5,207
Current [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 16,810	$ 16,756