Securities Available-for-Sale - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) Security	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Security	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) Security
Debt Securities, Available-for-Sale [Abstract]
Securities available for sale | Security	103		103
Number of holdings of securities aggregate carrying value exceeded ten percentage of stockholders' equity | Security			0		0
Available-for-sale were pledged as collateral	$ 73,000		$ 73,000		$ 74,100
Proceeds from maturities and principal payments received on securities available-for-sale	5,352	$ 1,450	8,055	$ 3,661
Gross realized gains or losses	$ 0	$ 0	$ 0	$ 0