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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Accounts Payable And Accrued Liabilities Current [Line Items]    
Accrued expenses $ 86,594 $ 51,616
Payroll Accruals [Member]    
Accounts Payable And Accrued Liabilities Current [Line Items]    
Accrued expenses 42,138 23,142
Customer and Storage Accruals [Member]    
Accounts Payable And Accrued Liabilities Current [Line Items]    
Accrued expenses 17,390 11,381
Sales and Other Taxes Payable [Member]    
Accounts Payable And Accrued Liabilities Current [Line Items]    
Accrued expenses 8,462 5,829
Other Accruals [Member]    
Accounts Payable And Accrued Liabilities Current [Line Items]    
Accrued expenses $ 18,604 $ 11,264