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SHAREHOLDERS' EQUITY (Tables)
 12 Months Ended
Dec. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Share Option Activity
 
2017
    
2016
    
2015
  
   
Number
of share options
    
Weighted average exercise price
    
Number
of share options
    
Weighted average exercise price
    
Number
of share options
    
Weighted average exercise price
  
Outstanding as of beginning of year
    
2,278,089
    
$
9.92
      
5,878,270
    
$
6.84
      
7,537,219
    
$
6.37
  
Granted
    
--
      
0.00
      
207,890
      
12.19
      
100,000
      
16.92
  
Exercised
    
(1,611,489
)
    
9.27
      
(3,649,754
)
    
4.82
      
(1,620,056
)
    
4.94
  
Terminated
    
(77,292
)
    
25.89
      
(97,063
)
    
21.34
      
(26,777
)
    
22.28
  
Forfeited
    
(9,123
)
    
8.06
      
(61,254
)
    
7.25
      
(112,116
)
    
8.30
  
Outstanding as of end of year
    
580,185
      
9.64
      
2,278,089
      
9.92
      
5,878,270
      
6.84
  
Options exercisable as of end of year
    
459,662
    
$
8.51
      
1,606,983
    
$
10.19
      
2,606,704
    
$
8.93
  
Schedule of Restricted Shares Units Activity
 
2017
    
2016
    
2015
  
   
Number
of RSU
    
Weighted Average
Fair Value
    
Number
of RSU
    
Weighted Average
Fair Value
    
Number
of RSU
    
Weighted Average
Fair Value
  
Outstanding as of beginning of year
    
1,009,184
    
$
14.62
      
773,200
    
$
15.11
      
--
    
$
--
  
Granted
    
818,856
      
24.88
      
359,643
      
12.83
      
783,700
      
15.11
  
Exercised
    
(553,241
)
    
14.71
      
(86,847
)
    
11.45
      
--
      
--
  
Forfeited
    
(28,910
)
    
16.42
      
(36,812
)
    
14.73
      
(10,500
)
    
15.15
  
Outstanding as of end of year
    
1,245,889
      
21.29
      
1,009,184
      
14.62
      
773,200
      
15.11
  
RSU exercisable as of end of year
    
--
    
$
--
      
--
    
$
--
      
--
    
$
--
  
Schedule of Information about Share Options Outstanding
Outstanding as of December 31, 2017
    
Exercisable as of December 31, 2017
  
Range of exercise prices
    
Number outstanding
    
Weighted average remaining
contractual life (in years)
    
Weighted average
exercise price
    
Number exercisable
    
Weighted average
exercise price
  
$
4.42-21.30
      
580,185
      
3.79
    
$
9.64
      
459,662
    
$
8.51
  
   
Year ended December 31,
  
   
2017
    
2016
    
2015
  
The intrinsic value of options exercised
  
$
26,031
    
$
40,314
    
$
15,374
  
The original fair value of options exercised
  
$
7,202
    
$
16,711
    
$
3,721
  
 
   
Year ended December 31,
  
   
2017
    
2016
    
2015
  
The intrinsic value of RSU's exercised
  
$
12,996
    
$
1,177
    
$
--
  
The original fair value of RSU's exercised
  
$
8,138
    
$
994
    
$
-
Schedule of Intrinsic and Fair Values for Options Exercised
Stock-based compensation expenses were recognized in the Statement of Operations as follows:
 
   
Year ended December 31,
  
   
2017
    
2016
    
2015
  
Cost of goods
  
$
3,084
    
$
3,920
    
$
2,214
  
Research and development, net
    
2,555
      
2,119
      
1,905
  
Marketing, general and administrative
    
6,010
      
3,367
      
3,421
  
Total stock-based compensation expense
  
$
11,649
    
$
9,406
    
$
7,540
  
Schedule of Intrinsic and Fair Values for RSU's Exercised
 
Year ended December 31,
  
   
2017
    
2016
    
2015
  
The intrinsic value of options exercised
  
$
26,031
    
$
40,314
    
$
15,374
  
The original fair value of options exercised
  
$
7,202
    
$
16,711
    
$
3,721
Schedule of Key Information for Option Plans
 
Year ended December 31,
  
   
2017
    
2016
    
2015
  
The intrinsic value of RSU's exercised
  
$
12,996
    
$
1,177
    
$
--
  
The original fair value of RSU's exercised
  
$
8,138
    
$
994
    
$
--
Schedule of Stock-Based Compensation Expense in Statement of Operations
Stock-based compensation expenses were recognized in the Statement of Operations as follows:
 
   
Year ended December 31,
  
   
2017
    
2016
    
2015
  
Cost of goods
  
$
3,084
    
$
3,920
    
$
2,214
  
Research and development, net
    
2,555
      
2,119
      
1,905
  
Marketing, general and administrative
    
6,010
      
3,367
      
3,421
  
Total stock-based compensation expense
  
$
11,649
    
$
9,406
    
$
7,540
  
Schedule of Fair Value of Options Granted
The Company utilizes the Black-Scholes model. The Company estimated the fair value, utilizing the following assumptions for the years 2016 and 2015 (all in weighted averages):

   
2016
    
2015
  
Risk-free interest rate
     0.9%-1.3%         
1.2%-1.4%     
Expected life of options
  
4.60 years
    
4.75 years
  
Expected annual volatility
    
47%-48%     
   
47%     
Expected dividend yield
  
none
    
none