Short-Term Investments - Additional Information (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2021 USD ($) InvestmentPosition	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) InvestmentPosition	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 1,118,638,000		$ 1,118,638,000		$ 655,232,000
Short-term investments mature within one year	$ 884,300,000		$ 884,300,000		$ 495,800,000
Percentage of short-term investments maturing within one year	79.00%		79.00%		76.00%
Short-term investments mature thereafter	$ 232,900,000		$ 232,900,000		$ 159,500,000
Percentage of short-term investments maturing thereafter	21.00%		21.00%		24.00%
Short-term investments realized gains or losses	$ 0	$ 0	$ 0	$ 0
Number of investments in unrealized loss positions | InvestmentPosition	300		300
Allowance for credit losses on investments that were in an unrealized loss position	$ 0		$ 0		$ 0
Minimum
Schedule Of Available For Sale Securities [Line Items]
Number of investment positions | InvestmentPosition	400		400
Accrued Interest Receivable
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 3,600,000		$ 3,600,000		2,500,000
Fair value	$ 3,600,000		$ 3,600,000		$ 2,500,000