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SHAREHOLDERS' EQUITY (Stock Options Under the Plans) (Details) - Employee Stock Option [Member] - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Number of options    
Options outstanding, beginning balance 856,986  
Granted [1] 173,800  
Exercised (257,511)  
Expired & forfeited (3,250)  
Options outstanding, ending balance 770,025 856,986
Exercisable at June 30, 2016 513,475  
Weighted average exercise price    
Options outstanding, beginning balance $ 7.75 $ 5.38
Granted [1] 11.29  
Exercised 6.23  
Expired & forfeited 9.94  
Options outstanding, ending balance 9.05 $ 7.75
Exercisable at June 30, 2016 $ 8.11  
Weighted average remaining contractual term (in years)    
Outstanding 3 years 5 months 12 days 3 years 3 months 11 days
Exercisable at June 30, 2016 2 years 10 months 10 days  
Aggregate intrinsic value    
Outstanding, beginning balance $ 6,157  
Outstanding, ending balance 2,179 $ 6,157
Options exercisable $ 1,922  
Vested and expected to vest at June 30, 2016    
Number of options 770,025  
Weighted average exercise price $ 9.05  
Weighted average remaining contractual life 3 years 5 months 12 days  
Aggregate intrinsic value $ 2,179  
[1] The fair value of the options granted during the six months period ended June 30, 2016 was estimated by using a Black-Scholes option-pricing model which requires the following assumptions: risk-free interest rates of 1.05% - 1.39% which is based on the yield from U.S. treasury zero-coupon bonds with an equivalent term to the options' expected term, expected volatility of 56.7% - 59.4% which is calculated based upon actual historical stock price movements over the most recent periods ending on the grant date and an expected term of 3.64 - 4.97 years which is generated by running Monte Carlo model pursuant to which historical post-vesting forfeitures and suboptimal exercise factor are estimated by using historical option exercise information of the options.