Stockholders' Equity (Share-Based Compensation Expense Included in the Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	$ 4,198	$ 3,700	$ 8,049	$ 5,930
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	771	730	1,570	1,218
Selling, distribution and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	65	59	131	99
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	3,100	2,650	5,746	4,140
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share base compensation	$ 262	$ 261	$ 602	$ 473