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SHARE-BASED COMPENSATION - Summary of Transactions Involving Performance Awards (Details) - Long Term Performance Stock Unit Awards - $ / shares
shares in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
No. of Units/Awards    
Balance at beginning of period (in shares) 59 59
Changes during the period:    
Granted (in shares) 167 0
Vested and settled (in shares) 0 0
Cancelled (in shares) 0 0
Balance at end of period (in shares) 226 59
Weighted Average Fair Value    
Balance at beginning of period (in usd per share) $ 37.16 $ 37.16
Changes during the period:    
Granted (in usd per share) 20.24 0.00
Cancelled (in usd per share) 0.00 0.00
Balance at end of period (in usd per share) $ 24.64 $ 37.16