Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 869,330		$ 829,859
Allowance for credit losses	(13,528)	$ (12,947)	(12,470)	$ (8,251)	$ (7,974)	$ (7,595)
Deferred loan fees, net	18		(81)
Net loans	855,820		817,308
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	162,593		152,657
Allowance for credit losses	(7,447)	(6,918)	(6,886)	(3,073)	(3,154)	(2,919)
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	254,178		255,911
Allowance for credit losses	(2,479)	(2,529)	(2,394)	(2,048)	(1,707)	(1,681)
Commercial Lessors of Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	126,401		114,010
Allowance for credit losses	(1,474)	(1,428)	(1,314)	(1,228)	(1,240)	(1,141)
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	56,180		47,982
Allowance for credit losses	(610)	(549)	(524)	(581)	(576)	(502)
Consumer Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	197,873		193,298
Allowance for credit losses	(829)	(843)	(838)	(779)	(758)	(812)
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	57,992		52,616
Allowance for credit losses	(396)	(379)	(227)	(205)	(193)	(205)
Consumer Installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,147		9,019
Allowance for credit losses	(112)	(110)	(84)	(92)	(89)	(92)
Consumer Indirect [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,966		4,366
Allowance for credit losses	$ (181)	$ (191)	$ (203)	$ (245)	$ (257)	$ (243)