Significant Accounting Policies Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 78,286	$ 46,048
Current operating lease liabilities	7,191	5,744
Non-current operating lease liabilities	$ 71,933	$ 41,114