Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 60,175	$ 88,246
Less accumulated depreciation	(45,607)	(65,410)
Property and equipment, net	14,568	22,836
Computer and Other Related Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	16,588	28,776
Purchased and Internally Developed Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	34,868	48,875
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,423	3,004
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 7,296	$ 7,591