Share-based Compensation - Schedule of Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Number of Options
Beginning balance (in shares)	7,147
Granted (in shares)	2,070
Exercised (in shares)	0
Forfeited (in shares)	(171)
Ending balance (in shares)	9,046	7,147
Options vested and exercisable at June 30, 2020 (in shares)	0
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 16.26
Granted (in dollars per share)	32.83
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	16.44
Ending valance (in dollars per share)	20.05	$ 16.26
Options vested and exercisable at June 30, 2020	$ 0
Weighted average remaining contractual term	9 years 3 months 18 days	9 years 3 months 18 days
Weighted average remaining contractual term, options vested and exercisable at June 30, 2020	0 years
Aggregate intrinsic value	$ 185,890	$ 54,423
Aggregate intrinsic value, options vested and exercisable at June 30, 2020	$ 0
Restricted Stock
Number of Restricted Shares
Balance, March 31, 2020 (in shares)	1,984
Granted (in shares)	0
Vested (in shares)	(650)
Forfeited (in shares)	(88)
Balance, June 30, 2020 (in shares)	1,246	1,984
Weighted Average Grant Date Fair Value
Balance, March 31, 2020 (in dollars per share)	$ 16.00
Granted (in dollars per share)	0
Vested (in dollars per share)	16.00
Forfeited (in dollars per share)	16.00
Balance, June 30, 2020 (in dollars per share)	$ 16.00	$ 16.00
Restricted Stock Units (RSUs)
Number of Restricted Shares
Balance, March 31, 2020 (in shares)	3,123
Granted (in shares)	1,128
Vested (in shares)	(132)
Forfeited (in shares)	(82)
Balance, June 30, 2020 (in shares)	4,037	3,123
Weighted Average Grant Date Fair Value
Balance, March 31, 2020 (in dollars per share)	$ 16.39
Granted (in dollars per share)	32.88
Vested (in dollars per share)	16.00
Forfeited (in dollars per share)	16.59
Balance, June 30, 2020 (in dollars per share)	$ 21.01	$ 16.39