Employee Benefit Plans - Summary of Stock Option 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
Number of Shares
Outstanding, vested and expected to vest, Beginning balance | shares	15,100,142
Granted | shares	2,636,878
Exercised | shares	(1,229,180)
Forfeited | shares	(774,324)
Expired | shares	(81,383)
Outstanding, vested and expected to vest, Ending balance | shares	15,652,133	15,100,142
Vested and exercisable at June 30, 2021 | shares	10,668,302
Weighted Average Exercise Price
Outstanding, vested and expected to vest, Beginning balance | $ / shares	$ 16.07
Granted | $ / shares	21.77
Exercised | $ / shares	14.45
Forfeited | $ / shares	19.35
Expired | $ / shares	19.49
Outstanding, vested and expected to vest, Ending balance | $ / shares	16.98	$ 16.07
Vested and exercisable at June 30, 2021 | $ / shares	$ 15.68
Outstanding, vested and expected to vest, Aggregate Intrinsic Value, Beginning balance | $	$ 67,395	$ 143,156
Vested and exercisable at June 30, 2021 | $	$ 58,283
Outstanding, vested and expected to vest, Weighted Average Remaining Contractual Term	6 years 9 months 18 days	6 years 10 months 24 days
Vested and exercisable, Weighted Average Remaining Contractual Term	5 years 10 months 24 days