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Mortgage and Other Indebtedness - Consolidated Indebtedness by Type of Interest Rate (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |
Amount | $ 1,198,584 | $ 1,543,301
Ratio (as percent) | 100.00% |
Weighted Average Interest Rate (as percent) | 4.03% |
Weighted Average Maturity (Years) | 5 years 10 months 24 days |
Net debt premiums and issuance costs, net | $ (6,970) |
Fixed rate debt |  |
Debt Instrument [Line Items] |  |
Amount | $ 1,148,803 |
Ratio (as percent) | 95.00% |
Weighted Average Interest Rate (as percent) | 4.01% |
Weighted Average Maturity (Years) | 5 years 9 months 18 days |
Variable rate debt |  |
Debt Instrument [Line Items] |  |
Amount | $ 56,751 |
Ratio (as percent) | 5.00% |
Weighted Average Interest Rate (as percent) | 3.92% |
Weighted Average Maturity (Years) | 7 years 8 months 12 days |
Floating Rate Debt Hedged | Variable rate debt |  |
Debt Instrument [Line Items] |  |
Amount | $ 266,200 |
Weighted Average Maturity (Years) | 3 years 3 months 18 days |

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