Equity (Schedule of Stock-based Compensation) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | $ 5,331 | $ 5,479 | $ 9,235 | $ 11,102 |
| Cost of sales [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | 799 | 729 | 1,442 | 1,451 |
| Research and development, net [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | 1,089 | 1,357 | 1,938 | 2,716 |
| Selling, general and administrative [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Total stock-based compensation expenses | $ 3,443 | $ 3,393 | $ 5,855 | $ 6,935 |