Allowance for Credit Losses - Summary of Aging Analysis of the Recorded Investment of Past-Due Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 757,443
Purchased Credit Impaired Loans		$ 2,409
Loans receivable	969,170	927,615
Total > 90 Days and Accruing		743
Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchased Credit Impaired Loans		0
Loans receivable		15,591
Total > 90 Days and Accruing		149
Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	50,552
Loans receivable	50,552
Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	75,628
Loans receivable	75,628
Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	104,869
Loans receivable	104,869
Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	113,254
Loans receivable	113,254	105,390
Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	154,520
Loans receivable	154,520
Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	254,691
Loans receivable	254,691	245,274
First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	170,271	168,084
Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans receivable	30,148	35,576
Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchased Credit Impaired Loans		0
Loans receivable		104,755
Total > 90 Days and Accruing		54
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchased Credit Impaired Loans		2,227
Loans receivable		540,914
Total > 90 Days and Accruing		0
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchased Credit Impaired Loans		182
Loans receivable		250,832
Total > 90 Days and Accruing		540
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchased Credit Impaired Loans		0
Loans receivable	3,929	10,057
Total > 90 Days and Accruing		0
Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,929
Purchased Credit Impaired Loans		0
Loans receivable	11,308	5,466
Total > 90 Days and Accruing		0
30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,475	3,895
30-59 Days Past Due [Member] | Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		193
30-59 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
30-59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	116
30-59 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
30-59 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	133
30-59 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	558
30-59 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	501
30-59 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	68
30-59 Days Past Due [Member] | Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		111
30-59 Days Past Due [Member] | Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		863
30-59 Days Past Due [Member] | Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		2,474
30-59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	5	254
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	364	352
60-89 Days Past Due [Member] | Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		48
60-89 Days Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
60-89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	100
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
60-89 Days Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
60-89 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
60-89 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
60-89 Days Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	224
60-89 Days Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	40
60-89 Days Past Due [Member] | Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		21
60-89 Days Past Due [Member] | Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		88
60-89 Days Past Due [Member] | Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		137
60-89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0	58
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	1,406	1,569
90 Days or Greater Past Due [Member] | Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		149
90 Days or Greater Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
90 Days or Greater Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
90 Days or Greater Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	51
90 Days or Greater Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
90 Days or Greater Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
90 Days or Greater Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	389
90 Days or Greater Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	836
90 Days or Greater Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	128
90 Days or Greater Past Due [Member] | Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		54
90 Days or Greater Past Due [Member] | Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		190
90 Days or Greater Past Due [Member] | Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		1,176
90 Days or Greater Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	2	0
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	3,245	5,816
Total Past Due [Member] | Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		390
Total Past Due [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
Total Past Due [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	194
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	167
Total Past Due [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	0
Total Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	133
Total Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	947
Total Past Due [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	1,561
Total Past Due [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	236
Total Past Due [Member] | Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		186
Total Past Due [Member] | Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		1,141
Total Past Due [Member] | Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		3,787
Total Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	7	312
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	965,925	919,390
Current [Member] | Agriculture Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		15,201
Current [Member] | Agriculture and Farmland [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	50,552
Current [Member] | Construction [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	75,434
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	104,702
Current [Member] | Multifamily [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	113,254
Current [Member] | Owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	154,387
Current [Member] | Non-owner Occupied [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	253,744
Current [Member] | First Liens [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	168,710
Current [Member] | Second Liens and Lines of Credit [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	29,912
Current [Member] | Commercial and PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		104,569
Current [Member] | Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		537,546
Current [Member] | Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross		246,863
Current [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	3,922	9,745
Current [Member] | Municipal Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans, Gross	$ 11,308	$ 5,466