Equity-Based Compensation - Equity-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Equity-based compensation expense
Total equity-based compensation expense	$ 6,389	$ 5,468	$ 18,058	$ 16,809
Income tax effect	(1,805)	(1,568)	(5,127)	(4,637)
After-tax effect of equity-based compensation expense	4,584	3,900	12,931	12,172
Cost of product sales and services
Equity-based compensation expense
Total equity-based compensation expense	566	118	892	395
Research and development
Equity-based compensation expense
Total equity-based compensation expense	799	858	2,651	2,583
Selling, general and administrative
Equity-based compensation expense
Total equity-based compensation expense	$ 5,024	$ 4,492	$ 14,515	$ 13,831