Investments - Schedule of Cash and Cash Equivalents and Securities Available for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Marketable Securities [Line Items]
Cash and cash equivalents	$ 1,630,038	$ 1,354,455	$ 1,013,106
Total cash and cash equivalents and securities available for sale:	1,242,423	963,397
Certificates of deposit
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	71,857	39,008
Corporate bonds
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	316,840	264,199
Commercial paper
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	197,114	126,761
Agency bonds
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	0	7,854
Municipal bonds
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	8,655	6,076
Government bonds, Non-US
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	2,169	5,340
Government bonds - US
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	296,344	344,434
Government bonds - US \| Asset Pledged as Collateral
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	101,300	75,400
Securitization notes receivable and certificates
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	68,358	75,469
Securitization notes receivable and certificates \| Asset Pledged as Collateral
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	5,600	34,500
Residual interests in structured transactions
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	5,582	2,284
Other
Marketable Securities [Line Items]
Total cash and cash equivalents and securities available for sale:	5,723	0
Money market funds
Marketable Securities [Line Items]
Cash and cash equivalents	237,815	70,920
Agency bonds
Marketable Securities [Line Items]
Cash and cash equivalents	0	3,493
Commercial paper
Marketable Securities [Line Items]
Cash and cash equivalents	25,979	12,564
Government bonds - US
Marketable Securities [Line Items]
Cash and cash equivalents	$ 5,987	$ 4,995