Revenue Recognition - Disaggregation of Revenue and Deferred Revenue (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 240,766	$ 182,911	$ 676,860	$ 507,005
Revenue recognized	110,600	87,100	447,200	339,500
Revenue Benchmark | Geographic Concentration Risk | UNITED STATES
Disaggregation of Revenue [Line Items]
Total revenue	$ 124,300	$ 94,200	$ 343,900	$ 263,300
Concentration risk percentage	52.00%	51.00%	51.00%	52.00%