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Discontinued Operations, Goodwill and Intangible Assets - Schedule of Income Statement Information of Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |
Net (loss) income from discontinuing operations | $ (43,880) | $ 5,677 | $ (63,766) | $ (104,998)
Held for Sale |  |  |  |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |
Revenue | 0 | 37,300 | 102,700 | 138,400
Cost of revenue | 0 | 41,800 | 106,600 | 139,500
Gross loss | 0 | (4,500) | (3,900) | (1,100)
Equity in losses of joint ventures | (100) | 0 | (6,100) | (3,400)
(Loss) income on disposal activities | (58,300) | 12,700 | (75,000) | (100,400)
Transaction costs | 0 | 0 | 0 | (200)
(Loss) income from operations | (58,400) | 8,200 | (85,000) | (105,100)
Other expense | (400) | (600) | (800) | (1,700)
(Loss) income before taxes | (58,800) | 7,600 | (85,800) | (106,800)
Income tax (benefit) expense | (14,900) | 1,900 | (22,000) | (1,800)
Net (loss) income from discontinuing operations | $ (43,900) | $ 5,700 | $ (63,800) | $ (105,000)

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