Mortgage and Other Indebtedness, Net- Scheduled Principal Payments (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
2020 (1)	$ 118,560,000
2021	557,328,000
2022	465,455,000
2023	1,491,825,000
2024	341,398,000
2025	36,105,000
Thereafter	711,636,000
Long-term Debt, Gross	3,722,307,000
Net unamortized discounts and premium	(9,330,000)
Unamortized deferred financing costs	(15,232,000)	$ (16,148,000)
Mortgage and other indebtedness, net	$ 3,789,692,000	$ 3,527,015,000
Weighted-average remaining term to maturity	3 years 6 months	3 years 8 months 12 days
Operating Property Loan
Debt Instrument [Line Items]
2020 (1)	$ 64,233,000
Number of operating property loans (loan) \| loan	1
Operating Property Loan \| Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 91,947,000

Debt instrument weighted average remaining term to maturity.

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Long-term Debt, Maturities, Repayments of Principal after Year Six

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Number of Operating Property Loans

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount (premium).

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