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SHAREHOLDERS' EQUITY (Details 3) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 5 Months Ended
Jan. 15, 2016
Dec. 31, 2015
Aug. 20, 2015
Aug. 30, 2015
Mar. 31, 2017
Mar. 31, 2016
Jan. 15, 2016
Aug. 17, 2015
Treasury shares, at cost [Member]                
Class of Stock [Line Items]                
Total cost         $ 151,242 $ 196,011    
Additional paid-in capital [Member]                
Class of Stock [Line Items]                
Total cost         $ 0 $ (60,000)    
August 17, 2015 ASR agreement [Member]                
Class of Stock [Line Items]                
Accelerated share repurchases, authorized amount               $ 300,000
Total cost       $ 300,000        
Total shares (in shares) 1,358,380.00   4,149,378 4,149,378     5,507,758  
Accelerated Share Repurchases, initial repurchase percentage       80.00%        
Average price per share (in usd per share)             $ 54.47  
August 17, 2015 ASR agreement [Member] | Treasury shares, at cost [Member]                
Class of Stock [Line Items]                
Total cost $ 60,000 $ 240,000            
August 17, 2015 ASR agreement [Member] | Additional paid-in capital [Member]                
Class of Stock [Line Items]                
Total cost   $ 60,000