Employee Benefits and Share-Based Compensation - Shared-Based Compensation Expense (Details) - 2009 Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 14,921	$ 12,785	$ 11,151
Income tax benefit	5,000	4,500	2,400
Cost of product and service revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	2,111	1,456	1,241
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	2,060	1,655	1,359
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 10,750	$ 9,674	$ 8,551