Stockholders' Equity (Share-Based Compensation Expense Included in the Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	$ 3,555	$ 3,427	$ 11,604	$ 9,357
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	675	638	2,245	1,856
Selling, distribution and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	45	49	176	148
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	2,593	2,536	8,339	6,676
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	$ 242	$ 204	$ 844	$ 677