Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Purchases of investments			$ 59,000,000	$ 89,400,000
Proceeds from the sales and maturities of securities available-for-sale			58,400,000	58,900,000
Transfers between Level 1, Level 2 and Level 3 securities			0	0
Cash collateral deposit	$ 1,000,000		1,000,000
Notional value	67,723,000		67,723,000		$ 64,454,000
Credit losses on available-for-sale securities	0	$ 0	0	$ 0
Interest Rate Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Notional value	$ 25,000,000		$ 25,000,000