Allowance for Credit Losses - Summary of Aging Analysis of the Recorded Investment of Past-Due Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 2,273,445	$ 2,255,104
Loans receivable	2,247,322	2,229,314
Loans, Aging Analysis [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,273,445	2,255,104
Loans, Aging Analysis [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	66,684	67,741
Loans, Aging Analysis [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	136,421	152,619
Loans, Aging Analysis [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	257,302	245,833
Loans, Aging Analysis [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	215,916	211,778
Loans, Aging Analysis [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	472,895	477,742
Loans, Aging Analysis [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	645,793	628,237
Loans, Aging Analysis [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	378,420	373,469
Loans, Aging Analysis [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	79,905	76,713
Loans, Aging Analysis [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	17,086	17,097
Loans, Aging Analysis [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	3,886	3,012
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	8,705	1,793
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	892	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	6,241	41
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	401	314
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	334
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	0
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	992	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	178	191
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	7	0
Loans, Aging Analysis [Member] | 30-59 Days Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	1
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	3,974	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	0	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	313	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	170	660
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,943	0
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	428	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	120	119
Loans, Aging Analysis [Member] | 60-89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	1	0
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	11,380	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	0	0
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	204	166
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	400	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	9,606	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	352	398
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	595	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	223	276
Loans, Aging Analysis [Member] | 90 Days or Greater Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	48	0
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	24,059	13,856
Loans, Aging Analysis [Member] | Total Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	892	23
Loans, Aging Analysis [Member] | Total Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	204	363
Loans, Aging Analysis [Member] | Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	6,641	131
Loans, Aging Analysis [Member] | Total Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	714	314
Loans, Aging Analysis [Member] | Total Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	9,776	9,762
Loans, Aging Analysis [Member] | Total Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	3,295	398
Loans, Aging Analysis [Member] | Total Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,015	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	521	586
Loans, Aging Analysis [Member] | Total Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	56	0
Loans, Aging Analysis [Member] | Total Past Due [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	0	1
Loans, Aging Analysis [Member] | Current [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	2,249,386	2,241,248
Loans, Aging Analysis [Member] | Current [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	65,792	67,718
Loans, Aging Analysis [Member] | Current [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	136,217	152,256
Loans, Aging Analysis [Member] | Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	250,661	245,702
Loans, Aging Analysis [Member] | Current [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	215,202	211,464
Loans, Aging Analysis [Member] | Current [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	463,119	467,980
Loans, Aging Analysis [Member] | Current [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	642,498	627,839
Loans, Aging Analysis [Member] | Current [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	376,405	371,246
Loans, Aging Analysis [Member] | Current [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	79,384	76,127
Loans, Aging Analysis [Member] | Current [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	17,030	17,097
Loans, Aging Analysis [Member] | Current [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	$ 3,886	$ 3,011