Goodwill and Other Intangible Assets - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 USD ($) reportingUnit	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 271,829,000		$ 271,829,000
Number of reporting units | reportingUnit	1
Goodwill, impairment loss	$ 0	$ 0
Amortization of intangible assets	436,000	$ 516,000
Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 6,600,000		$ 7,100,000