Furniture, Equipment and Leasehold Improvements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation, Depletion and Amortization	$ 27,737	$ 24,640	$ 22,946
Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, before Accumulated Amortization	9,419	7,033
Hosting Arrangement, Service Contract, Implementation Cost, Expense, Amortization	$ 1,245
Special Charges [Member]
Property, Plant and Equipment [Line Items]
Depreciation, Depletion and Amortization		3,320	$ 4,370
Asset Impairment Charges		1,656
Special Charges [Member] | Leasehold Improvements
Property, Plant and Equipment [Line Items]
Asset Impairment Charges		$ 480