Premises and Equipment - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 108,702	$ 129,501
Less accumulated depreciation and amortization	(91,777)	(91,227)
Premises and equipment, net	16,925	38,274
Computer Hardware
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	33,585	32,747
Operating Lease ROU Assets
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	26,930	31,329
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	21,272	22,019
Computer Software
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	16,371	24,377
Office Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	6,958	6,929
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	3,463	3,506
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	0	8,550
Other
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 123	$ 44

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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