Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Foreign rate differential	(2.60%)	(3.20%)	(3.30%)
R&D tax credits	(0.80%)	(0.70%)	(0.50%)
State taxes, net of federal benefit	1.90%	1.90%	2.00%
Section 199 deduction	(1.30%)	(1.50%)	(1.30%)
Stock-based compensation	(3.90%)	(1.60%)	(0.00%)
Tax Cuts and Jobs Act of 2017	(20.80%)	0.00%	0.00%
Other, net	(1.40%)	0.10%	(1.30%)
Effective Rate	6.10%	30.00%	30.60%