Premises and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset	$ 38,170	$ 40,171
Operating Lease, Liability	42,627	44,654
Depreciation included in noninterest expense	9,400	9,400	$ 9,600
Operating Lease, Expense	5,600	5,900	5,900
Operating Lease, Right-of-Use Asset, Periodic Reduction	$ 2,600	$ 3,700	$ 3,600