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Joint Ventures and Variable Interest Entities - Schedule of Equity in Earnings of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Joint Ventures and Variable Interest Entities [Line Items]
Total	$ 6,864	$ 19,459	$ 16,417	$ (9,482)
Unconsolidated Joint Ventures
Joint Ventures and Variable Interest Entities [Line Items]
Total			16,400	(9,500)
Unconsolidated Joint Ventures | Pass-through joint ventures
Joint Ventures and Variable Interest Entities [Line Items]
Total			17,300	17,600
Unconsolidated Joint Ventures | Other joint ventures
Joint Ventures and Variable Interest Entities [Line Items]
Total			$ (900)	$ (27,100)

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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