Summary of Significant Accounting Policies - Schedule of Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Property and equipment	$ 21,454	$ 32,904
Property and equipment		3,432
Indefinite-lived intangibles	43,948	50,454
Indefinite-lived intangibles	2,996
Definite-lived intangibles	8,220	27,986
Goodwill	6,881	20,608
Goodwill	1,084	663
Current assets	696	681
Goodwill
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	(4,239)	(566)	$ (6,307)
Property and equipment
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	(58)	(1,029)	(2,202)
Indefinite-lived intangibles
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	(5,516)	(293)	(5,296)
Definite-lived intangibles
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	(1,813)	0	0
Operating lease right-of-use assets
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	(1,003)	0	0
Other assets (equity securities)
Defined Benefit Plan Disclosure [Line Items]
Unrealized Gain (Loss/Impairments) Recognized	0	0	$ (84)
Quoted Prices in Active Markets for Identical Asset (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Property and equipment	0	0
Property and equipment		0
Indefinite-lived intangibles	0	0
Indefinite-lived intangibles	0
Definite-lived intangibles	0	0
Goodwill	0	0
Goodwill	0	0
Current assets	0	0
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Property and equipment	0	0
Property and equipment		0
Indefinite-lived intangibles	0	0
Indefinite-lived intangibles	0
Definite-lived intangibles	0	0
Goodwill	0	0
Goodwill	0	0
Current assets	0	0
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Property and equipment	21,454	32,904
Property and equipment		3,432
Indefinite-lived intangibles	43,948	50,454
Indefinite-lived intangibles	2,996
Definite-lived intangibles	8,220	27,986
Goodwill	6,881	20,608
Goodwill	1,084	663
Current assets	$ 696	$ 681

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Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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