Equity Based Compensation - Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Dec. 31, 2016	Mar. 31, 2017
Nonvested Options, Weighted Average Exercise Price
Unrecognized compensation costs		$ 23,600
Stock option awards
Options
Outstanding, beginning of period (in shares)		2,735,500
Exercised (in shares)		0
Granted (in shares)		1,429,500
Forfeited (in shares)		(35,000)
Outstanding, end of period (in shares)	2,735,500	4,130,000
Exercisable (in shares)		0
Weighted Average Exercise Price
Outstanding, beginning of period (In dollars per share)		$ 14.67
Exercised (in dollars per share)		0.00
Granted (in dollars per share)		18.08
Forfeited (in dollars per share)		14.52
Outstanding, end of period (In dollars per share)	$ 14.67	15.85
Exercisable (in dollars per share)		$ 0.00
Granted, weighted average remaining term		5 years 10 months 14 days
Forfeited, weighted average remaining term		5 years 6 months 27 days
Outstanding, weighted average remaining term	5 years 9 months 18 days	5 years 8 months 5 days
Granted, aggregate intrinsic value		$ 361
Forfeited, aggregate intrinsic value		130
Outstanding, aggregate intrinsic value	$ 13,804	9,999
Exercisable, aggregate intrinsic value		$ 0
Nonvested Options
Non-vested, beginning of period (in shares)		2,735,500
Vested (in shares)		0
Granted (in shares)		1,429,500
Forfeited (in shares)		(35,000)
Non-vested, end of period (in shares)	2,735,500	4,130,000
Nonvested Options, Weighted Average Grant Date Fair Value
Non-vested, beginning of period (in dollars per share)		$ 5.93
Vested (in dollars per share)		0.00
Granted (in dollars per share)		7.21
Forfeited (in dollars per share)		5.86
Non-vested, end of period (in dollars per share)	$ 5.93	6.38
Nonvested Options, Weighted Average Exercise Price
Non-vested, beginning of period (in dollar per share)		14.67
Vested (in dollars per share)		0.00
Granted (in dollars per share)		18.08
Forfeited (in dollars per share)		14.52
Non-vested, end of period (in dollars per share)	$ 14.67	$ 15.85
Unrecognized compensation costs, period for recognition		2 years 8 months 5 days