Commitments and Contingencies - Net Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 6,424	$ 6,654
Variable lease cost	1,262	1,537
Sublease income	(369)	(358)
Net lease cost	$ 7,317	$ 7,833

No definition available.

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Section 55
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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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