Stockholders' Equity and Employee Benefit Plans - Summary of Restricted Stock Units (Details) - Restricted Stock Units - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Unvested, Beginning balance	5,752,046	8,838,281	8,533,775
Granted	6,270,720	3,911,841	2,936,437
Vested, gross of shares withheld for employee payroll taxes	(3,660,767)	(5,883,890)	(1,443,302)
Forfeited/canceled, including shares withheld for employee payroll taxes	(1,386,005)	(1,114,186)	(1,188,629)
Unvested, Ending balance	6,975,994	5,752,046	8,838,281	8,533,775
Weighted Average Grant-Date Fair Value
Unvested, Beginning balance	$ 12.77	$ 12.52	$ 12.89
Granted	15.23	13.26	11.91
Vested, gross of shares withheld for employee payroll taxes	12.99	12.75	13.52
Forfeited/canceled, including shares withheld for employee payroll taxes	13.53	12.65	12.71
Unvested, Ending balance	$ 14.72	$ 12.77	$ 12.52	$ 12.89
Weighted Average Remaining Contractual Term (in years)
Unvested, Weighted Average Remaining Contractual Term	2 years 2 months 12 days	1 year 2 months 12 days	2 years 2 months 12 days	3 years 3 months 18 days