Short-Term Investments - Additional Information (Details)	3 Months Ended
	Sep. 30, 2021 USD ($) InvestmentPosition	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 821,495,000		$ 655,232,000
Short-term investments mature within one year	$ 625,800,000		$ 495,800,000
Percentage of short-term investments maturing within one year	76.00%		76.00%
Short-term investments mature thereafter	$ 195,800,000		$ 159,500,000
Percentage of short-term investments maturing thereafter	24.00%		24.00%
Short-term investments realized gains or losses	$ 0	$ 0
Number of investments in unrealized loss positions | InvestmentPosition	120
Allowance for credit losses on investments that were in an unrealized loss position	$ 0		$ 0
Minimum
Schedule Of Available For Sale Securities [Line Items]
Number of investment positions | InvestmentPosition	300
Accrued Interest Receivable
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 2,300,000		2,500,000
Fair value	$ 2,300,000		$ 2,500,000