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SHARE-BASED AWARDS AND OPTIONS - Share-Based Awards (Details) - Share-Based Awards
shares in Thousands
3 Months Ended
Mar. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Beginning balance (in shares) | shares 1,263
Granted (in shares) | shares 441
Vested (in shares) | shares (3)
Forfeited (in shares) | shares (24)
Ending balance (in shares) | shares 1,677
Weighted-Average Grant-Date Fair Value  
Beginning balance (in USD per share) | $ / shares $ 49.55
Granted (in USD per share) | $ / shares 79.47
Vested (in USD per share) | $ / shares 42.90
Forfeited (in USD per share) | $ / shares 56.74
Ending balance (in USD per share) | $ / shares $ 57.30