Investment Securities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2025 USD ($) Securities	Dec. 31, 2024 USD ($) Securities
Debt Securities, Available-for-Sale [Abstract]
Allowance for credit losses on available for sale debt securities	$ 0	$ 0
Number of debt securities with unrealized losses | Securities	187	210
Proceeds from sales	$ 0	$ 1,691,000
Accrued interest receivable on available for sale debt securities	$ 1,260,000	$ 817,000
Held to maturity debt securities with unrealized losses | Securities	9	10
Accrued interest receivable on held-to-maturity debt securities	$ 195,000	$ 278,000
Tax (provision) benefit		1,000
Pledged debt securities with a carrying value	$ 55,130,000	$ 57,852,000