Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 31,638	$ 31,638
Accumulated Amortization	(31,638)	(24,217)
Net Carrying Amount	0	7,421
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	29,984	29,984
Accumulated Amortization	(29,984)	(22,711)
Net Carrying Amount	0	7,273
Software license rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,654	1,654
Accumulated Amortization	(1,654)	(1,506)
Net Carrying Amount	$ 0	$ 148