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Acquisitions - Schedule of Intangible Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Dec. 01, 2022	Nov. 01, 2021
Asset Acquisition [Line Items]
Net Book Value	$ 18,229	$ 18,975
Intangible asset impairment charge	0	0	$ 2,000
Concorde
Asset Acquisition [Line Items]
Net Book Value				$ 5,400
MIAT College Of Technology
Asset Acquisition [Line Items]
Net Book Value					$ 16,200
Intangible asset impairment charge			$ 2,000
Trademarks and trade names
Asset Acquisition [Line Items]
Finite-lived intangible assets, net book value	876	1,262
Trademarks and trade names | Concorde
Asset Acquisition [Line Items]
Useful life				10 years
Finite-lived intangible assets, net book value				$ 500
Curriculum development
Asset Acquisition [Line Items]
Finite-lived intangible assets, net book value	1,053	1,413
Curriculum development | Concorde
Asset Acquisition [Line Items]
Useful life				5 years
Finite-lived intangible assets, net book value				$ 1,400
Curriculum development | MIAT College Of Technology
Asset Acquisition [Line Items]
Useful life					5 years
Finite-lived intangible assets, net book value					$ 400
Accreditations and regulatory approvals
Asset Acquisition [Line Items]
Indefinite-lived intangible assets, gross carrying amount	$ 16,300	$ 16,300
Accreditations and regulatory approvals | Concorde
Asset Acquisition [Line Items]
Indefinite-lived intangible assets, gross carrying amount				$ 3,500
Accreditations and regulatory approvals | MIAT College Of Technology
Asset Acquisition [Line Items]
Indefinite-lived intangible assets, gross carrying amount					12,800
Trademarks and trade names | MIAT College Of Technology
Asset Acquisition [Line Items]
Useful life			4 years
Indefinite-lived intangible assets, gross carrying amount					$ 3,000
Fair value of intangible asset			$ 1,000

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