Goodwill and Other Intangible Assets - Changes in Servicing Rights (Detail) - Servicing Rights [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning of period	$ 8,572	$ 7,878	$ 6,408
Servicing rights capitalized	1,946	2,344	4,206
Amortization of servicing rights	(1,443)	(1,658)	(2,810)
Changes in valuation allowance	(93)	8	74
End of period	8,982	8,572	7,878
Residential mortgage and SBA loans serviced for others	$ 1,630,032	$ 1,503,149	$ 1,428,020