Qualified Affordable Housing Project Investments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Investments in Affordable Housing Projects [Abstract]
Investments for qualified affordable housing projects included in other assets	$ 14,819,000		$ 15,122,000
Unfunded commitments related to the investments in qualified affordable housing projects	5,229,000		$ 5,722,000
Recognized amortization expense	304,000	$ 243,000
Recognized tax credits and other benefits from its investments in affordable housing tax credits	390,000	$ 364,000
Impairment losses related to its investments in qualified affordable housing projects	$ 0