Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of property and equipment
Property and equipment, at cost	$ 174,960	$ 174,960	$ 202,698
Accumulated depreciation	(140,234)	(140,234)	(139,269)
Property and equipment, net	34,726	34,726	63,429
Depreciation		19,829	25,649	$ 20,983
Asset impairment charges	12,800
Assets held for sale	34,726	34,726	63,429
Equipment
Summary of property and equipment
Property and equipment, net	3,100	3,100
Assets held for sale	3,100	3,100
Buildings
Summary of property and equipment
Property and equipment, net	3,800	3,800
Assets held for sale	3,800	3,800
Land
Summary of property and equipment
Property and equipment, net	1,900	1,900
Assets held for sale	1,900	1,900
Leasehold improvements
Summary of property and equipment
Property and equipment, at cost	20,414	$ 20,414	21,790
Leasehold improvements | Minimum
Summary of property and equipment
Estimated useful lives		1 year
Leasehold improvements | Maximum
Summary of property and equipment
Estimated useful lives		15 years
Furniture and fixtures
Summary of property and equipment
Property and equipment, at cost	23,872	$ 23,872	28,482
Furniture and fixtures | Minimum
Summary of property and equipment
Estimated useful lives		3 years
Furniture and fixtures | Maximum
Summary of property and equipment
Estimated useful lives		10 years
Equipment
Summary of property and equipment
Property and equipment, at cost	12,561	$ 12,561	20,248
Equipment | Minimum
Summary of property and equipment
Estimated useful lives		2 years
Equipment | Maximum
Summary of property and equipment
Estimated useful lives		15 years
Computer software
Summary of property and equipment
Property and equipment, at cost	92,033	$ 92,033	100,507
Computer software | Minimum
Summary of property and equipment
Estimated useful lives		1 year
Computer software | Maximum
Summary of property and equipment
Estimated useful lives		10 years
Data processing equipment
Summary of property and equipment
Property and equipment, at cost	16,726	$ 16,726	17,056
Data processing equipment | Minimum
Summary of property and equipment
Estimated useful lives		1 year
Data processing equipment | Maximum
Summary of property and equipment
Estimated useful lives		5 years
Buildings
Summary of property and equipment
Property and equipment, at cost	7,490	$ 7,490	11,772
Buildings | Minimum
Summary of property and equipment
Estimated useful lives		1 year
Buildings | Maximum
Summary of property and equipment
Estimated useful lives		30 years
Land
Summary of property and equipment
Property and equipment, at cost	$ 1,864	$ 1,864	$ 2,843