Goodwill and Intangible Assets - Amortization Expense for Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization expense	$ 9,300	$ 10,600	$ 3,500
2017	7,421
Net Carrying Amount	7,421	16,713
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization expense	$ 9,100	$ 10,000	$ 2,700