Mortgage and Other Indebtedness, Net - Debt of Operating Partnership (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Mortgage notes payable	$ 2,560,364	$ 2,695,888
Mortgage and other indebtedness, variable-rate debt	1,183,186	847,275
Total fixed-rate and variable-rate debt	3,743,550	3,543,163
Unamortized deferred financing costs	(13,864)	(16,148)
Total mortgage and other indebtedness, net	$ 3,729,686	$ 3,527,015
Weighted average interest rate (as a percent)	6.51%	5.02%
Senior Secured Facility
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.00%
Fixed Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.31%	5.35%
Variable Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	9.12%	3.98%
Post-Default Rate \| Senior Secured Facility
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	9.50%
LIBOR Market Index Rate \| Senior Secured Facility
Debt Instrument [Line Items]
Debt instrument variable interest rate	2.41%
Non-Recourse Loans on Operating Properties
Debt Instrument [Line Items]
Mortgage notes payable	$ 1,193,997	$ 1,330,561
Non-Recourse Loans on Operating Properties \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.17%	5.27%
Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Mortgage notes payable	$ 299,966	$ 299,960
Debt Instrument Unamortized Discount	$ 34	$ 40
Senior Unsecured Notes Due 2024 \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	4.60%	4.60%
Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Mortgage notes payable	$ 618,136	$ 617,473
Debt Instrument Unamortized Discount	$ 6,864	$ 7,527
Senior Unsecured Notes Due 2026 \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.95%	5.95%
Recourse loans on operating Properties
Debt Instrument [Line Items]
Mortgage and other indebtedness, variable-rate debt	$ 68,511	$ 41,950
Recourse loans on operating Properties \| Variable Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	2.91%	4.34%
Construction loan
Debt Instrument [Line Items]
Mortgage and other indebtedness, variable-rate debt		$ 29,400
Construction loan \| Variable Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)		4.60%
Secured Line of Credit
Debt Instrument [Line Items]
Mortgage and other indebtedness, variable-rate debt	$ 675,925	$ 310,925
Weighted average interest rate (as a percent)	9.50%	3.94%
Secured Line of Credit \| Intangible Lease Assets And Other Assets
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ (7,180)
Secured Term Loan
Debt Instrument [Line Items]
Mortgage and other indebtedness, variable-rate debt	$ 438,750	$ 465,000
Weighted average interest rate (as a percent)	9.50%	3.94%
Senior Unsecured Notes Due 2023
Debt Instrument [Line Items]
Mortgage notes payable	$ 448,265	$ 447,894
Debt Instrument Unamortized Discount	$ 1,736	$ 2,106
Senior Unsecured Notes Due 2023 \| Fixed Rate Interest
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.25%	5.25%
Secured Term Loan, Senior Unsecured Notes and Certain Property-level, Non-recourse Mortgage Loans
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ (10,524)
Recourse and Nonrecourse Term Loans
Debt Instrument [Line Items]
Secured non-recourse and recourse term loans	$ 2,334,160

Long Term Debt, Net Excluding Deferred Financing Costs

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

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

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