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Leases - Operating Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Leases [Abstract]        
Operating lease expense $ 11,810 $ 11,899 $ 35,594 $ 36,238
Short-term lease expense 683 741 1,858 2,302
Variable lease expense 5,208 6,478 17,486 18,814
Total lease expense $ 17,701 $ 19,118 $ 54,938 $ 57,354