Goodwill and Other Intangible Assets - Changes in Servicing Rights (Detail) - Servicing Rights [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning of period	$ 8,982	$ 8,572	$ 7,878
Servicing rights capitalized	2,724	1,946	2,344
Amortization of servicing rights	(1,341)	(1,443)	(1,658)
Sold servicing rights	(3,466)	0	0
Changes in valuation allowance	91	(93)	8
End of period	6,990	8,982	8,572
Residential mortgage and SBA loans serviced for others	$ 1,032,011	$ 1,630,032	$ 1,503,149