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Leases - Components of Lease Expense and Supplemental Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Leases [Abstract]        
Operating lease costs $ 3,738 $ 3,943 $ 7,477 $ 7,945
Variable lease costs $ 1,888 $ 2,280 $ 3,808 $ 3,820
Lease weighted-average remaining lease term 14 years 8 months 12 days 15 years 3 months 18 days 14 years 8 months 12 days 15 years 3 months 18 days
Lease weighted average discount rate 6.30% 6.50% 6.30% 6.50%