Employee and Consultant Equity-Based Compensation - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Outstanding, beginning balance (shares)	8,090,636	7,328,131
Granted (shares)	3,067,888	1,390,014
Forfeited (shares)	(533,503)	(230,779)
Exercised (shares)	(383,319)	(357,373)
Expired (shares)	(109,140)	(39,357)
Outstanding, ending balance (shares)	10,132,562	8,090,636	7,328,131
Exercisable, ending balance (shares)	6,231,099
Weighted Average Exercise Price per Share
Outstanding, beginning balance (dollars per share)	$ 12.22	$ 10.16
Granted (dollars per share)	14.52	24.46
Forfeited (dollars per share)	20.65	21.47
Exercised (dollars per share)	13.99	10.49
Expired (dollars per share)	23.86	22.24
Outstanding, ending balance (dollars per share)	12.28	$ 12.22	$ 10.16
Exercisable, ending balance (dollars per share)	$ 9.17
Cash received from the exercise of options	$ 5,400,000
Tax benefit from share-based compensation	0
Intrinsic value of options exercised	2,300,000	$ 4,600,000	$ 12,100,000
Fair value of shares vesting	$ 9,900,000	$ 13,400,000	$ 12,000,000.0