Employee and Consultant Equity-Based Compensation - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding, beginning balance (shares)	6,167,170	5,628,726
Granted (shares)	1,024,050	717,833
Forfeited (shares)	(147,663)	(54,505)
Exercised (shares)	(158,743)	(124,884)
Expired (shares)	(27,690)	0
Outstanding, ending balance (shares)	6,857,124	6,167,170	5,628,726
Exercisable, ending balance (shares)	4,566,005
Weighted Average Exercise Price per Share
Outstanding, beginning balance (dollars per share)	$ 6.91	$ 5.20
Granted (dollars per share)	14.05	20.59
Forfeited (dollars per share)	18.43	11.71
Exercised (dollars per share)	7.47	6.44
Expired (dollars per share)	4.87	0.00
Outstanding, ending balance (dollars per share)	7.72	$ 6.91	$ 5.20
Exercisable, ending balance (dollars per share)	$ 4.94
Cash received from the exercise of options	$ 1,200,000
Tax benefit from share-based compensation	0
Intrinsic value of options exercised	2,200,000	$ 2,000,000	$ 3,800,000
Fair value of shares vesting	$ 6,600,000	$ 7,300,000	$ 3,800,000