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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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financial Information
Equity in (losses) earnings of joint ventures	$ (303,503)	$ 7,489	$ (286,218)	$ 27,358
Impairment loss	$ 307,000
Unconsolidated joint ventures
Financial Information
Equity in (losses) earnings of joint ventures			(286,200)	27,400
Unconsolidated joint ventures | Pass-through joint ventures
Financial Information
Equity in (losses) earnings of joint ventures			18,200	19,000
Unconsolidated joint ventures | Other joint ventures
Financial Information
Equity in (losses) earnings of joint ventures			$ (304,400)	$ 8,400

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