Loans Receivable - Summary of Portfolio Segments and Classes of Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 2,273,445	$ 2,255,104
Deferred costs	496	645
Allowance for credit losses	(26,619)	(26,435)	$ (23,842)	$ (23,767)
Net loans	2,247,322	2,229,314
Agriculture and Farmland Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	66,684	67,741
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	136,421	152,619
Allowance for credit losses	(1,360)	(893)	(1,523)	(959)
Commercial & Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	257,302	245,833
Multifamily [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	215,916	211,778
Allowance for credit losses	(1,813)	(1,805)	(1,592)	(1,483)
Owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	472,895	477,742
Non-owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	645,793	628,237
Allowance for credit losses	(9,050)	(9,345)	(6,099)	(5,773)
First Liens [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	378,420	373,469
Allowance for credit losses	(3,299)	(3,395)	(4,675)	(4,778)
Second Liens and Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	79,905	76,713
Allowance for credit losses	(1,208)	(1,154)	(1,071)	(1,072)
Consumer and Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	17,097	17,086
Municipal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	3,012	3,886
Allowance for credit losses	$ (36)	$ (48)	$ (68)	$ (79)