Premises and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Right-of-use lease assets	$ 51,879	$ 48,855
Accumulated depreciation and amortization	(186,829)	(171,144)
Total premises and equipment, net	553,062	483,469
Land
Property, Plant and Equipment [Line Items]
Premises and equipment	122,827	101,728
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment	364,076	320,844
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment	112,688	107,122
Software
Property, Plant and Equipment [Line Items]
Premises and equipment	67,215	66,947
Construction in progress
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 21,206	$ 9,117