Allowance for Credit Losses - Summary of Aging Analysis of the Recorded Investment of Past-Due Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 2,355,869	$ 2,255,104
Loans receivable	2,331,958	2,229,314
Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,355,869	2,255,104
Loans, Aging Analysis [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	61,996	67,741
Loans, Aging Analysis [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	140,976	152,619
Loans, Aging Analysis [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	259,877	245,833
Loans, Aging Analysis [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	231,469	211,778
Loans, Aging Analysis [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	502,515	477,742
Loans, Aging Analysis [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	681,521	628,237
Loans, Aging Analysis [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	375,879	373,469
Loans, Aging Analysis [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	81,194	76,713
Loans, Aging Analysis [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	17,525	17,086
Loans, Aging Analysis [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,917	3,886
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	6,836	1,793
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	323	23
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	197
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	394	41
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	314
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	875	334
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,629	0
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,422	686
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	192	191
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	1	7
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	7,704	1,097
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	6,065	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	311	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	587	660
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	23	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	684	317
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	34	119
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	1
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	11,368	10,966
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	382	0
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	9	166
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	700	90
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	8,983	8,768
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	277	398
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	716	1,220
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	301	276
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	48
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | Total Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	25,908	13,856
Loans, Aging Analysis [Member] | Total Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	705	23
Loans, Aging Analysis [Member] | Total Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	9	363
Loans, Aging Analysis [Member] | Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	7,159	131
Loans, Aging Analysis [Member] | Total Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	311	314
Loans, Aging Analysis [Member] | Total Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	10,445	9,762
Loans, Aging Analysis [Member] | Total Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,929	398
Loans, Aging Analysis [Member] | Total Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	3,822	2,223
Loans, Aging Analysis [Member] | Total Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	527	586
Loans, Aging Analysis [Member] | Total Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	1	56
Loans, Aging Analysis [Member] | Total Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | Current [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,329,961	2,241,248
Loans, Aging Analysis [Member] | Current [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	61,291	67,718
Loans, Aging Analysis [Member] | Current [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	140,967	152,256
Loans, Aging Analysis [Member] | Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	252,718	245,702
Loans, Aging Analysis [Member] | Current [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	231,158	211,464
Loans, Aging Analysis [Member] | Current [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	492,070	467,980
Loans, Aging Analysis [Member] | Current [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	678,592	627,839
Loans, Aging Analysis [Member] | Current [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	372,057	371,246
Loans, Aging Analysis [Member] | Current [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	80,667	76,127
Loans, Aging Analysis [Member] | Current [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	17,524	17,030
Loans, Aging Analysis [Member] | Current [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 2,917	$ 3,886