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SHAREHOLDERS' EQUITY (Schedule of Stock-Based Compensation Expense in Statement of Operations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
The effect of stock- based compensation on the Statement of Operations is as follow:      
Total stock-based compensation expense $ 11,649 $ 9,406 $ 7,540
Cost of goods [Member]      
The effect of stock- based compensation on the Statement of Operations is as follow:      
Total stock-based compensation expense 3,084 3,920 2,214
Research and development, net [Member]      
The effect of stock- based compensation on the Statement of Operations is as follow:      
Total stock-based compensation expense 2,555 2,119 1,905
Marketing, general and administrative [Member]      
The effect of stock- based compensation on the Statement of Operations is as follow:      
Total stock-based compensation expense $ 6,010 $ 3,367 $ 3,421