Premises and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 706,981	$ 676,454
Accumulated depreciation and amortization	(380,675)	(356,657)
Total premises and equipment, net	326,306	319,797
Depreciation and amortization	28,800	30,600	$ 29,400
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	89,444	90,379
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	212,658	214,476
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	92,186	88,898
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 312,693	$ 282,701