Fixed Assets, Net - Major Classifications of Fixed Assets and Related Useful Lives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 50,439	$ 56,570
Less accumulated depreciation	(23,635)	(26,595)
Total Fixed assets, net	26,804	29,975
Land
Property, Plant and Equipment [Line Items]
Fixed assets, gross	5,892	5,892
Building and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 25,964	25,990
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	3 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	40 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 6,926	8,760
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	1 year
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	10 years
Computer equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 5,472	6,446
Computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	1 year
Computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 6,185	$ 9,482
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	1 year
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	8 years