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Stock-based Compensation - Management Unit Awards - Additional Disclosures (Details) - Management Unit Awards - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Stock-based Compensation    
Weighted average grant date fair value (in dollars per share) $ 15.00 $ 15.00
Unrecognized expenses $ 0.9  
Weighted-average remaining recognition period (in years) 1 year 3 months 18 days