Mortgages, Notes and Loans Payable, Net (Borrowings Activity) (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Notes And Loans Payable [Roll Forward]
Balance at December 31, 2020	$ 4,287,369
Issuances/Borrowings	1,503,083	$ 392,714
Repayments/Redemptions	(1,328,054)	(51,008)
Special Improvement District bond assumptions	(1,010)	$ (779)
Deferred financing costs, net	(12,054)
Balance at June 30, 2021	$ 4,449,333
Victoria Place
Debt Instrument [Line Items]
Interest Rate	5.25%
Notes And Loans Payable [Roll Forward]
Issuances/Borrowings	$ 42,718
Tanager Apartments
Debt Instrument [Line Items]
Interest Rate	3.13%
Notes And Loans Payable [Roll Forward]
Issuances/Borrowings	$ 58,500
1201 Lake Robbins
Debt Instrument [Line Items]
Interest Rate	2.49%
Notes And Loans Payable [Roll Forward]
Repayments/Redemptions	$ (273,070)
The Woodlands Warehouse
Debt Instrument [Line Items]
Interest Rate	2.49%
Notes And Loans Payable [Roll Forward]
Repayments/Redemptions	$ (7,230)
Tanager Apartments
Debt Instrument [Line Items]
Interest Rate	2.50%
Notes And Loans Payable [Roll Forward]
Repayments/Redemptions	$ (39,992)
Existing mortgages, notes and loans payable
Notes And Loans Payable [Roll Forward]
Issuances/Borrowings	101,864
Repayments/Redemptions	$ (7,762)
Senior Notes \| Senior Notes due 2029
Debt Instrument [Line Items]
Interest Rate	4.13%
Notes And Loans Payable [Roll Forward]
Issuances/Borrowings	$ 650,000
Senior Notes \| Senior Notes due 2031
Debt Instrument [Line Items]
Interest Rate	4.38%
Notes And Loans Payable [Roll Forward]
Issuances/Borrowings	$ 650,000
Senior Notes \| Senior Notes due 2025
Debt Instrument [Line Items]
Interest Rate	5.38%
Notes And Loans Payable [Roll Forward]
Repayments/Redemptions	$ (1,000,000)
Special Improvement District bonds
Debt Instrument [Line Items]
Interest Rate	4.00%
Notes And Loans Payable [Roll Forward]
Special Improvement District bond assumptions	$ (1,010)

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Notes And Loans Payable [Roll Forward]

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This element represents special improvement district bond transfers associated with land sales.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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