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SHAREHOLDERS' EQUITY (DETAILS 3) - USD ($) $ / shares in Units, $ in Thousands | 5 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 15, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Treasury Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Total cost |  | $ 571,805 | $ 264,538 | $ 543,202
Additional paid-in capital [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Total cost |  | $ (60,000) | 60,000 | $ 0
Accelerated Share Repurchase Agreement August 17 2015 [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Total cost |  |  | $ 300,000 |
Total shares (in shares) | 5,507,758 | 1,358,380 | 4,149,378 |
Accelerated Share Repurchases, initial repurchase percentage |  |  | 80.00% |
Average price per share (in usd per share) | $ 54.47 |  |  |
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Treasury Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Total cost |  | $ 60,000 | $ 240,000 |
Accelerated Share Repurchase Agreement August 17 2015 [Member] | Additional paid-in capital [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Total cost |  | $ (60,000) | $ 60,000 |

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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