Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 538,863	$ 553,253
Less: Accumulated depreciation and amortization	(318,506)	(321,773)
Net premises and equipment	220,357	231,480
Land
Property, Plant and Equipment [Line Items]
Total premises and equipment	38,494	38,654
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total premises and equipment	346,098	343,604
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total premises and equipment	145,627	165,572
Construction in progress
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 8,644	$ 5,423