Stock-Based Compensation Expense and Employee Benefit Plans - Stock Option and Stock Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Outstanding Options/RSUs, Number of Shares
Outstanding (in shares)	15,354,271
Granted (in shares)	0
Exercised (in shares)	(2,470,262)
Cancelled (in shares)	(630,306)
Outstanding (in shares)	12,253,703	15,354,271
Outstanding Options Weighted Average Exercise Price
Outstanding (in dollars per share) | $ / shares	$ 21.27
Exercised (in dollars per share) | $ / shares	24.67
Cancelled (in dollars per share) | $ / shares	13.58
Outstanding (in dollars per share) | $ / shares	$ 20.98	$ 21.27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Vested and expected to vest (in shares)	12,046,166
Exercisable (in shares)	8,619,596
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares	$ 21.18
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 25.28
Outstanding, remaining contractual life	5 years 9 months 18 days	6 years
Outstanding, aggregate intrinsic value | $	$ 96,586	$ 129,855
Vested and expected to vest, remaining contractual life	5 years 9 months 18 days
Exercisable, remaining contractual life	5 years 1 month 6 days
Vested and expected to vest, aggregate intrinsic value | $	$ 92,978
Exercisable, aggregate intrinsic value | $	$ 37,719