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SHAREHOLDERS' EQUITY (DETAILS 3) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended
Jan. 15, 2016
Dec. 31, 2015
Aug. 30, 2015
Sep. 30, 2015
Jan. 15, 2016
Jun. 30, 2016
Jun. 30, 2015
Aug. 17, 2015
Treasury shares, at cost [Member]                
Class of Stock [Line Items]                
Total cost           $ 323,050 $ 17,930  
Additional paid-in capital [Member]                
Class of Stock [Line Items]                
Total cost           $ (60,000) $ 0  
August 17, 2015 ASR agreement [Member]                
Class of Stock [Line Items]                
Total cost     $ 300,000          
Total shares 1,358,380.00   4,149,378 4,149,378 5,507,758 1,358,380    
Accelerated Share Repurchases, Authorized Amount               $ 300,000
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