Loans Receivable - Summary of Portfolio Segments and Classes of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 2,355,869		$ 2,255,104
Deferred costs	740		645
Allowance for credit losses	(24,651)	$ (26,619)	(26,435)	$ (26,288)	$ (23,842)	$ (23,767)
Net loans	2,331,958		2,229,314
Agriculture and Farmland Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	61,996		67,741
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	140,976		152,619
Allowance for credit losses	(1,478)	(1,360)	(893)	(1,841)	(1,523)	(959)
Commercial & Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	259,877		245,833
Multifamily [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	231,469		211,778
Allowance for credit losses	(1,879)	(1,813)	(1,805)	(1,914)	(1,592)	(1,483)
Owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	502,515		477,742
Non-owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	681,521		628,237
Allowance for credit losses	(6,724)	(9,050)	(9,345)	(8,026)	(6,099)	(5,773)
First Liens [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	375,879		373,469
Allowance for credit losses	(3,227)	(3,299)	(3,395)	(4,047)	(4,675)	(4,778)
Second Liens and Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	81,194		76,713
Allowance for credit losses	(1,188)	(1,208)	(1,154)	(977)	(1,071)	(1,072)
Consumer and Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	17,525		17,086
Municipal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	2,917		3,886
Allowance for credit losses	$ (37)	$ (36)	$ (48)	$ (64)	$ (68)	$ (79)