Equity-Based Compensation - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity-based compensation expense
Total equity-based compensation expense	$ 4,888	$ 1,946	$ 11,572	$ 6,153
Income tax effect	(871)		(3,464)
After-tax effect of equity-based compensation expense	4,017	1,946	8,108	6,153
Cost of Sales
Equity-based compensation expense
Total equity-based compensation expense	159	32	254	89
Research and Development Expense
Equity-based compensation expense
Total equity-based compensation expense	1,028	466	2,071	1,274
Selling, General and Administrative Expenses [Member]
Equity-based compensation expense
Total equity-based compensation expense	$ 3,701	$ 1,448	$ 9,247	$ 4,790