Leases - Schedule of Cash Flow and Other Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash received for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 0	$ 3,099
Right-of-use assets adjusted in exchange for new/amended operating lease liabilities	0	64
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,840	$ 2,080
Weighted-average remaining lease term (in years)	12 years 4 months 24 days	13 years 3 months 18 days
Weighted-average discount rate	8.00%	8.00%