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Joint Ventures and Variable Interest Entities - Equity in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Financial Information
Equity in earnings of joint ventures	$ 26,200	$ 7,500	$ 12,000	$ 7,900	$ 11,400	$ 8,200	$ 7,200	$ 8,200	$ 53,640	$ 35,044	$ 48,781
Unconsolidated Joint Ventures
Financial Information
Equity in earnings of joint ventures									53,600	35,000	48,800
Unconsolidated Joint Ventures | Pass through joint ventures
Financial Information
Equity in earnings of joint ventures									29,200	23,600	34,100
Unconsolidated Joint Ventures | Other joint ventures
Financial Information
Equity in earnings of joint ventures									$ 24,400	$ 11,400	$ 14,700

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- Definition

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

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