Goodwill and Core Deposit Intangibles - Schedule of Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Goodwill, Beginning balance	$ 53,101	$ 53,101
Acquired in acquisition	0
Goodwill, Ending balance	53,101	53,101	$ 53,101
Beginning Balance	7,222
Amortization	(4,289)	(3,374)	(4,042)
Ending Balance	14,969	7,222
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Beginning Balance	7,222	10,596
Acquired in acquisition	12,036
Amortization	(4,289)	(3,374)
Ending Balance	$ 14,969	$ 7,222	$ 10,596