Mortgages, Notes and Loans Payable, Net (Narrative) (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) debtInstrument	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Other assets, net	$ 276,385		$ 278,587
Weighted-average Interest Rate	7.86%		5.91%
Proceeds from mortgages, notes, and loans payable	$ 559,305	$ 576,230
Repayments	110,847	534,458
Special Improvement District bond transfers associated with land sales	3,119	$ 5,860
Refundable deposit	$ 27,500
Derivative asset, number of instruments held | debtInstrument	6
Debt instruments totaling	$ 11,000
Secured Bridgeland Notes
Debt Instrument [Line Items]
Face amount	133,000		$ 475,000	$ 67,000		$ 275,000
Outstanding borrowings	$ 475,000
Interest rate margin	7.62%		6.60%
Interest Rate Derivatives
Debt Instrument [Line Items]
Interest rate margin			5.28%
Senior Notes
Debt Instrument [Line Items]
Face amount	$ 2,050,000				$ 2,100,000		$ 2,100,000
Mortgages
Debt Instrument [Line Items]
Weighted-average Interest Rate	6.24%		5.51%
Proceeds from mortgages, notes, and loans payable	$ 115,000
Outstanding borrowings	244,300
Repayments	110,800
Long term debt, undrawn lender commitment	$ 1,100,000
Mortgages | Minimum
Debt Instrument [Line Items]
Range of Interest Rates	3.13%		3.13%
Mortgages | Maximum
Debt Instrument [Line Items]
Range of Interest Rates	13.87%		9.39%
Bonds
Debt Instrument [Line Items]
Special Improvement District bond transfers associated with land sales	$ 3,100
Special improvement district bond issued	$ 0
Bonds | Minimum | MPC Segment
Debt Instrument [Line Items]
Range of Interest Rates	4.13%
Bonds | Maximum | MPC Segment
Debt Instrument [Line Items]
Range of Interest Rates	6.05%
Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Other assets, net	$ 4,800,000