Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 125,520,000		$ 125,520,000		$ 125,520,000
Amortization of core deposit intangible assets	363,000	$ 398,000	1,121,000	$ 1,195,000
Valuation allowance	$ 0	$ 0	$ 0	$ 0