Securities - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of available for sale securities		$ 0	$ 222,474,000	$ 0
Avaliable for sale of debt securities realized gains or losses		$ 0		$ 0
Reinvested in debt securities	$ 220,000,000
Reinvested debt securities, average yield percentage	1.86%
Sale of low yielding securities	$ 226,000,000
Debt securities. average yield percentage	0.16%
Gross losses realized			$ 3,990,000