Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 43,102	$ 60,175
Less accumulated depreciation	(30,543)	(45,607)
Property and equipment, net	12,559	14,568
Computer and Other Related Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	8,465	16,588
Purchased and Internally Developed Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	26,468	34,868
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,465	1,423
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6,704	$ 7,296