Allowance for Credit Losses - Summary of Aging Analysis of the Recorded Investment of Past-Due Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 2,192,719	$ 2,128,110
Loans receivable	2,166,909	2,104,517
Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,192,719	2,128,110
Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	66,937	65,861
Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	178,697	161,825
Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	240,376	232,412
Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	195,814	176,843
Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	470,545	474,964
Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	577,448	551,481
First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	374,043	376,092
Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	68,990	66,648
Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	4,362	5,244
Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	15,507	16,740
30-59 Days Past Due [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,855	1,239
30-59 Days Past Due [Member] | Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	14
30-59 Days Past Due [Member] | Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	10
30-59 Days Past Due [Member] | Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	50	46
30-59 Days Past Due [Member] | Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
30-59 Days Past Due [Member] | Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,758	156
30-59 Days Past Due [Member] | Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
30-59 Days Past Due [Member] | First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,806	719
30-59 Days Past Due [Member] | Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	233	279
30-59 Days Past Due [Member] | Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	8	15
30-59 Days Past Due [Member] | Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,338	3,451
60-89 Days Past Due [Member] | Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member] | Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	10	0
60-89 Days Past Due [Member] | Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	180	1
60-89 Days Past Due [Member] | Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
60-89 Days Past Due [Member] | Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	618	2,802
60-89 Days Past Due [Member] | Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	218	86
60-89 Days Past Due [Member] | First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	311	419
60-89 Days Past Due [Member] | Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1	128
60-89 Days Past Due [Member] | Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	15
60-89 Days Past Due [Member] | Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
90 Days or Greater Past Due [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	5,334	2,661
90 Days or Greater Past Due [Member] | Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	189	0
90 Days or Greater Past Due [Member] | Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	89	191
90 Days or Greater Past Due [Member] | Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	30	118
90 Days or Greater Past Due [Member] | Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
90 Days or Greater Past Due [Member] | Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2,976	137
90 Days or Greater Past Due [Member] | Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	352	1,239
90 Days or Greater Past Due [Member] | First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,359	872
90 Days or Greater Past Due [Member] | Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	339	97
90 Days or Greater Past Due [Member] | Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	7
90 Days or Greater Past Due [Member] | Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Total Past Due [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	10,527	7,351
Total Past Due [Member] | Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	189	14
Total Past Due [Member] | Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	99	201
Total Past Due [Member] | Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	260	165
Total Past Due [Member] | Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Total Past Due [Member] | Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	5,352	3,095
Total Past Due [Member] | Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	570	1,325
Total Past Due [Member] | First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,476	2,010
Total Past Due [Member] | Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	573	504
Total Past Due [Member] | Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	8	37
Total Past Due [Member] | Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	0
Current [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2,182,192	2,120,759
Current [Member] | Agriculture and Farmland [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	66,748	65,847
Current [Member] | Construction [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	178,598	161,624
Current [Member] | Commercial and Industrial [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	240,116	232,247
Current [Member] | Multifamily [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	195,814	176,843
Current [Member] | Owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	465,193	471,869
Current [Member] | Non-owner Occupied [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	576,878	550,156
Current [Member] | First Liens [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	370,567	374,082
Current [Member] | Second Liens and Lines of Credit [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	68,417	66,144
Current [Member] | Consumer Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	4,354	5,207
Current [Member] | Municipal Loans [Member] | Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 15,507	$ 16,740