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v3.20.4

Mortgage and Other Indebtedness - Consolidated Indebtedness by Type of Debt (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Apr. 24, 2018 extension | Dec. 31, 2020 USD ($) extension | Dec. 31, 2019 USD ($)
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | $ 1,176,076 | $ 1,153,302
Unamortized Net Premiums |  | 1,732 | 2,176
Unamortized Debt Issuance Costs |  | (7,014) | (8,898)
Long-term debt |  | 1,170,794 | 1,146,580
Revolving Credit Facility |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | 25,000 | 0
Unamortized Net Premiums |  | 0 | 0
Unamortized Debt Issuance Costs |  | (1,672) | (2,625)
Long-term debt |  | 23,328 | (2,625)
Line of credit facility, remaining borrowing capacity |  | $ 523,200 | $ 583,400
Basis spread on variable rate (as percent) |  | 1.15% | 1.15%
Interest rate, effective percentage (as percent) |  | 1.29% | 2.91%
Number of additional extensions | extension | 2 | 2 |
Extension period (in years) | 6 months | 6 months |
Senior Unsecured Notes | Fixed Rate Debt |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | $ 550,000 | $ 550,000
Unamortized Net Premiums |  | 0 | 0
Unamortized Debt Issuance Costs |  | (3,595) | (4,231)
Long-term debt |  | $ 546,405 | $ 545,769
Senior Unsecured Notes | Fixed Rate Debt | Minimum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Interest rate during period (as percent) |  | 4.00% | 4.00%
Senior Unsecured Notes | Fixed Rate Debt | Maximum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Interest rate during period (as percent) |  | 4.57% | 4.57%
Unsecured Debt |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | $ 250,000 | $ 250,000
Unamortized Net Premiums |  | 0 | 0
Unamortized Debt Issuance Costs |  | (1,647) | (1,859)
Long-term debt |  | $ 248,353 | $ 248,141
Unsecured Debt | Unsecured Term Loans, Maturing October 2025 |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Basis spread on variable rate (as percent) |  | 2.00% | 2.00%
Interest rate, effective percentage (as percent) |  | 2.14% | 3.76%
Mortgages | Fixed Rate Debt |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | $ 295,966 | $ 297,472
Unamortized Net Premiums |  | 1,732 | 2,176
Unamortized Debt Issuance Costs |  | (25) | (40)
Long-term debt |  | $ 297,673 | $ 299,608
Mortgages | Fixed Rate Debt | Minimum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Interest rate during period (as percent) |  | 3.78% | 3.78%
Mortgages | Fixed Rate Debt | Maximum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Interest rate during period (as percent) |  | 5.73% | 5.73%
Mortgages | Variable Rate Debt |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Principal |  | $ 55,110 | $ 55,830
Unamortized Net Premiums |  | 0 | 0
Unamortized Debt Issuance Costs |  | (75) | (143)
Long-term debt |  | $ 55,035 | $ 55,687
Mortgages | Variable Rate Debt | Minimum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Basis spread on variable rate (as percent) |  | 1.60% | 1.60%
Mortgages | Variable Rate Debt | Maximum |  |  |
Participating Mortgage Loans [Line Items] |  |  |
Basis spread on variable rate (as percent) |  | 1.74% | 3.36%

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