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Leases - Supplemental Cash Flow and Other Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Cash received for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 0	$ 8,918	$ 3,099	$ 17,929
Right-of-use assets obtained in exchange for amended operating lease liabilities	0	0	64	22,582
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,046	$ 1,098	$ 4,016	$ 2,196
Weighted-average remaining lease term (in years)	13 years	6 years 7 months 6 days	13 years	6 years 7 months 6 days
Weighted-average discount rate	8.00%	8.50%	8.00%	8.50%

X

- Definition

Cash Flow, Operating Activities, Lessee, Cash Received For Amounts Included In Measurement Of Lease Liabilities

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Operating Lease, Cash Received For Amounts Included In Measurement Of Lease Liabilities

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-5

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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Publisher FASB
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
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