Accounts Receivable, Deferred Revenue and Performance Obligations (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Contract With Customer, Liability [Roll Forward]
Deferred revenue, beginning of period	$ 316,327	$ 271,597
Billings	146,112	124,799
Revenue recognized	(162,585)	(141,010)
Deferred revenue, end of period	$ 299,854	$ 255,386