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SHAREHOLDERS' EQUITY (DETAILS 2) - Common Stock [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Treasury Shares [Line Items]        
Total shares 60 3,058 350 7,094
Total cost $ 3,158 $ 139,380 $ 17,929 $ 318,082
Average price per share $ 52.51 $ 45.59 $ 51.22 $ 44.84
In the Open Market [Member]        
Treasury Shares [Line Items]        
Total shares 0 2,970 16 6,680
Total cost $ 0 $ 135,395 $ 832 $ 300,000
Average price per share $ 0.00 $ 45.59 $ 50.69 $ 44.91
From Employees [Member]        
Treasury Shares [Line Items]        
Total shares 60 88 334 414
Total cost $ 3,158 $ 3,985 $ 17,097 $ 18,082
Average price per share $ 52.51 $ 45.57 $ 51.17 $ 43.66