Debt - Summary of Total Interest Expense Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Debt Instrument [Line Items]
Amortization of debt discount and debt issuance costs including initial purchaser discount		$ 22,150	$ 12,550	$ 10,057
0.25% Convertible Senior Note Due 2022
Debt Instrument [Line Items]
Debt instrument, interest rate	0.25%	0.25%		0.25%
0.25% contractual coupon	$ 876		874	$ 731
Amortization of debt discount and debt issuance costs including initial purchaser discount	13,172		12,550	10,058
Interest expense	$ 14,048		$ 13,424	$ 10,789