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Joint Ventures and Variable Interest Entities - Equity in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Financial Information
Equity in earnings (losses) of joint ventures	$ 7,647	$ (303,503)	$ (1,835)	$ (286,218)
Unconsolidated joint ventures
Financial Information
Equity in earnings (losses) of joint ventures			(1,800)	(286,200)
Unconsolidated joint ventures | Pass-through joint ventures
Financial Information
Equity in earnings (losses) of joint ventures			24,700	18,200
Unconsolidated joint ventures | Other joint ventures
Financial Information
Equity in earnings (losses) of joint ventures			$ (26,500)	$ (304,400)

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