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EARNINGS PER SHARE Accelerated Share Repurchase (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2015
Accelerated Share Repurchases [Line Items] |  |  |  |
Payments for Repurchase of Common Stock |  | $ (56,665) | $ (740) |
Stock Repurchase Program, Authorized Amount | $ 300,000 | $ 300,000 |  |
Treasury Stock, Shares, Acquired | 804,291 |  |  |
Stock Repurchase Program Expiration Date |  | Dec. 31, 2017 |  |
Treasury Stock, Common [Member] |  |  |  |
Accelerated Share Repurchases [Line Items] |  |  |  |
Payments for Repurchase of Common Stock | $ (50,000) |  |  | $ (150,000)
Treasury Stock, Common, Shares | 2,468,576 | 2,468,576 |  |

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