Premises, Software and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	$ 1,212,981	$ 1,176,560
Less: Accumulated depreciation and amortization	464,015	411,762
Total premises, software, and equipment, net	748,966	764,798
Depreciation and amortization expense	56,900	53,100	$ 54,000
Land
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	166,036	166,707
Buildings and leasehold improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	687,326	674,887
Furniture, equipment and computer software
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	333,176	307,468
Construction in progress
Property, Plant and Equipment, Net, by Type [Abstract]
Premises and equipment, gross	$ 26,443	$ 27,498