Intangible Assets, Net - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-lived intangible assets:
Total finite-lived intangible assets	$ 275,230	$ 275,230
Accumulated amortization:
Total accumulated amortization	(215,527)	(208,136)
Total finite-lived intangible assets, net	59,703	67,094
Trade name (indefinite-lived)	31,646	31,646
Total intangible assets, net	91,349	98,740
Backlog
Finite-lived intangible assets:
Total finite-lived intangible assets	72,630	72,630
Accumulated amortization:
Total accumulated amortization	(72,630)	(72,630)
Customer Relationships
Finite-lived intangible assets:
Total finite-lived intangible assets	145,051	145,051
Accumulated amortization:
Total accumulated amortization	(97,155)	(92,661)
Developed Technologies
Finite-lived intangible assets:
Total finite-lived intangible assets	54,475	54,475
Accumulated amortization:
Total accumulated amortization	(43,580)	(40,856)
Other
Finite-lived intangible assets:
Total finite-lived intangible assets	3,074	3,074
Accumulated amortization:
Total accumulated amortization	$ (2,162)	$ (1,989)