Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset	$ 40,550	$ 42,617
Operating Lease, Liability	44,801	46,819
Premises and equipment, available-for-sale	1,900	2,600
Operating Leases, Rent Expense, Contingent Rentals	4,500	6,700	$ 4,900
Premises and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation included in noninterest expense	9,900	10,900	$ 10,500
Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Depreciation included in noninterest expense	$ 1,400	$ 2,600