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SHAREHOLDERS' EQUITY (DETAILS 3) - USD ($) $ / shares in Units, $ in Thousands |  | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 15, 2016 | Jan. 15, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Treasury Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total cost |  |  | $ 264,538 | $ 543,202 | $ 472,263
Additional paid-in capital [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total cost |  |  | 60,000 | $ 0 | $ 0
Accelerated Share Repurchase Agreement August 17 2015 [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total cost |  |  | $ 300,000 |  |
Total shares |  |  | 4,149,378 |  |
Accelerated Share Repurchases, initial repurchase percentage |  |  | 80.00% |  |
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Subsequent Event [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total shares | 1,358,380 | 5,507,758 |  |  |
Average price per share |  | $ 54.47 |  |  |
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Treasury Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total cost |  |  | $ 240,000 |  |
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Additional paid-in capital [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Total cost |  |  | $ 60,000 |  |

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