Fixed Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 500,329	$ 464,946
Less: accumulated depreciation and amortization	(308,997)	(286,023)
Fixed assets, net	191,332	178,923
Depreciation expense	32,500	28,000	$ 23,200
Land
Property, Plant and Equipment [Line Items]
Fixed assets, gross	18,152	18,152
Buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	142,181	139,274
Furniture and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	48,507	46,450
Capitalized software
Property, Plant and Equipment [Line Items]
Fixed assets, gross	284,912	254,066
Leasehold improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 6,577	$ 7,004