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Equity-based Compensation Plans - Restricted Stock Units (Details)
shares in Thousands
3 Months Ended
Mar. 31, 2017
shares
Restricted Stock Units  
Outstanding at December 31, 2016 (in shares) 144
Granted (in shares) 4
Forfeited (in shares) (1)
Outstanding at March 31, 2017 (in shares) 147