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Leases - Operating Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Leases [Abstract]        
Operating lease expense $ 12,181 $ 11,870 $ 24,697 $ 23,784
Short-term lease expense 744 619 1,399 1,175
Variable lease expense 5,650 6,034 10,986 12,278
Total lease expense $ 18,575 $ 18,523 $ 37,082 $ 37,237