Balance Sheet Components - Cash, Cash Equivalents, Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Cash and cash equivalents	$ 300,859	$ 248,164
Restricted cash included in prepaid expenses and other current assets	16,804	11,673
Restricted cash included in other assets	1,601	2,303
Total cash, cash equivalents and restricted cash	$ 319,264	$ 262,140	$ 189,270	$ 120,382