Fixed Assets - Major Classifications of Fixed Assets and Related Useful Lives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 67,900	$ 71,565
Less accumulated depreciation	(32,082)	(31,885)
Fixed assets, net	35,818	39,680
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	$ 25,755	25,733
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	$ 17,467	17,285
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	20 years
Computer Equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 6,289	9,231
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	$ 12,497	$ 13,424
Leasehold Improvements | Minimum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	3 years
Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Fixed assets, useful life	7 years