Equity (Schedule of Stock-based Compensation) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | $ 4,898 | $ 4,784 | $ 14,133 | $ 15,886 |
| Cost of sales [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | 642 | 680 | 2,084 | 2,131 |
| Research and development, net [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | 905 | 1,103 | 2,843 | 3,819 |
| Selling, general and administrative [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | $ 3,351 | $ 3,001 | $ 9,206 | $ 9,936 |