Loans Receivable - Summary of Portfolio Segments and Classes of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	$ 2,215,234		$ 2,128,110
Deferred costs	634		174
Allowance for credit losses	(26,542)	$ (26,289)	(23,767)	$ (9,964)	$ (10,228)	$ (4,666)
Net loans	2,189,326		2,104,517
Agriculture and Farmland Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	65,166		65,861
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	162,032		161,825
Allowance for credit losses	(1,305)	(1,841)	(959)	(453)	(728)	(274)
Commercial & Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	235,144		232,412
Multifamily [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	206,867		176,843
Allowance for credit losses	(2,177)	(1,914)	(1,483)	(419)	(673)	(480)
Owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	479,361		474,964
Non-owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	598,681		551,481
Allowance for credit losses	(8,756)	(8,026)	(5,773)	(4,130)	(4,350)	(1,116)
First Liens [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	374,130		376,092
Allowance for credit losses	(3,768)	(4,047)	(4,778)	(1,452)	(1,397)	(1,029)
Second Liens and Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	72,061		66,648
Allowance for credit losses	(1,099)	(977)	(1,072)	(326)	(383)	(218)
Consumer and Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	17,496		16,740
Municipal Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable	4,296		5,244
Allowance for credit losses	$ (65)	$ (64)	$ (79)	$ (7)	$ (7)	$ (12)