Equity-based Compensation - LTI Target Awards (Details) - Equity Plan [Member] - LTI Target Awards [Member]	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Number of Shares/Units
Unvested shares, Beginning Balance (shares) | shares	1,522,487
Granted (shares) | shares	726,867
Forfeited (shares) | shares	(3,413)
Unvested shares, Ending Balance (shares) | shares	2,245,941
Weighted-Average Grant Date Fair Value
Unvested shares, Beginning Balance (in dollars per share) | $ / shares	$ 9.00
Granted (in dollars per share) | $ / shares	8.96
Forfeited (in dollars per share) | $ / shares	11.77
Unvested shares, Ending Balance (in dollars per share) | $ / shares	$ 8.98