Revenue Recognition - Disaggregation of Revenue and Deferred Revenue Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 182,911	$ 143,298	$ 507,005	$ 395,226
Revenue recognized	123,700	60,700	407,000	235,000
Remaining performance obligation, amount	1,050,600		1,050,600
Billed consideration
Disaggregation of Revenue [Line Items]
Remaining performance obligation, amount	471,900		471,900
Unbilled consideration
Disaggregation of Revenue [Line Items]
Remaining performance obligation, amount	578,700		578,700
Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Total revenue	$ 94,200	$ 77,700	$ 263,300	$ 218,100
Concentration risk percentage	51.00%	54.00%	52.00%	55.00%