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STOCKHOLDERS' EQUITY (Narrative) (Details)
$ in Thousands
1 Months Ended 12 Months Ended 13 Months Ended
Feb. 21, 2012
Feb. 28, 2017
USD ($)
Feb. 27, 2017
USD ($)
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Jan. 31, 2017
USD ($)
Jan. 31, 2016
USD ($)
Jan. 31, 2015
USD ($)
Feb. 28, 2017
₪ / shares
Treasury stock acquired | shares       2,507,314 2,507,314 2,507,314        
Percentage of outstanding stock in treasury stock       10.70% 10.70% 10.70%        
Dividend rate as a percentage of net profits 50.00%                  
Dividend paid       $ 13,968 $ 13,171 $ 15,697 $ 18,200 $ 16,300 $ 20,200  
Subsequent Event [Member]                    
Dividend paid   $ 8,500 $ 5,000              
Cash dividend declared, value per share | ₪ / shares                   ₪ 0.40
Dividends payable date                   2017-04