Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 43,104	$ 60,175
Less accumulated depreciation	(31,124)	(45,607)
Property and equipment, net	11,980	14,568
Computer and Other Related Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	8,621	16,588
Purchased and Internally Developed Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	26,312	34,868
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,467	1,423
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6,704	$ 7,296