Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers between Level 1, Level 2 and Level 3 securities	$ 0	$ 0
Cash collateral deposit	1,100,000
Proceeds from the sales and maturities of securities available-for-sale	62,400,000	29,500,000
Purchases of investments	93,400,000	78,600,000
Credit losses on available-for-sale securities	$ 0	$ 0