Premises and Equipment - Bank Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Lease right-of-use assets	$ 63,547	$ 66,023
Total	430,284	426,681
Accumulated depreciation	(137,162)	(126,185)
Net	293,122	300,496
Premises
Property, Plant and Equipment [Line Items]
Gross	247,484	250,313
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross	29,412	21,289
Furniture and equipment
Property, Plant and Equipment [Line Items]
Gross	65,286	64,798
Computer equipment
Property, Plant and Equipment [Line Items]
Gross	24,412	24,114
Autos
Property, Plant and Equipment [Line Items]
Gross	$ 143	$ 144