CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 280,543	$ 587,643
Restricted cash (included in other current assets)	4,295	52,191
Total cash, cash equivalents and restricted cash	284,838	$ 639,834
Pledged as Collateral
Current assets:
Restricted cash (included in other current assets)	$ 4,300