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Disposed Properties - Schedule of Disposal Groups (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) ft² | Dec. 31, 2019 USD ($) ft² | Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ 8,456 | $ 357,800 | $ 466,175
Loss on Extinguishment of Debt | $ (2,543) | $ (2,901) | $ 9,103
Retail |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² | 237,822 | 977,400 |
Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² | 161,610 | 2,098,400 |
Gross Disposition Price | $ 8,456 | $ 357,800 |
Gain (Loss) on Sale, net | 1,752 | 62,011 |
Loss on Extinguishment of Debt |  | $ (2,901) |
University Oaks Shopping Center | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | 527 |  |
Gain (Loss) on Sale, net | 357 |  |
Centerplace of Greeley | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | 123 |  |
Gain (Loss) on Sale, net | $ 100 |  |
Woodlake Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² | 160,000 |  |
Gross Disposition Price | $ 5,500 |  |
Gain (Loss) on Sale, net | (213) |  |
Eldridge Town Center | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Exchange |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | 451 |  |
Gain (Loss) on Sale, net | $ 424 |  |
Antoine Town Center | Retail | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Condemnation |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² | 1,610 |  |
Gross Disposition Price | $ 800 |  |
Gain (Loss) on Sale, net | 66 |  |
Eldridge Town Center One | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | 1,055 |  |
Gain (Loss) on Sale, net | $ 1,018 |  |
Brooks Corner | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 173,000 |
Gross Disposition Price |  | $ 26,300 |
Gain (Loss) on Sale, net |  | 5,531 |
Loss on Extinguishment of Debt |  | $ (809) |
Silverlake | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 101,000 |
Gross Disposition Price |  | $ 6,650 |
Gain (Loss) on Sale, net |  | 131 |
Loss on Extinguishment of Debt |  | $ 0 |
Promenade Fultondale | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 207,600 |
Gross Disposition Price |  | $ 23,200 |
Gain (Loss) on Sale, net |  | 1,861 |
Loss on Extinguishment of Debt |  | $ 0 |
Crossroads at Chesapeake Square and Chesapeake Commons | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 198,700 |
Gross Disposition Price |  | $ 23,100 |
Gain (Loss) on Sale, net |  | 1,353 |
Loss on Extinguishment of Debt |  | $ 0 |
West Creek | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 53,300 |
Gross Disposition Price |  | $ 18,700 |
Gain (Loss) on Sale, net |  | 5,962 |
Loss on Extinguishment of Debt |  | $ 0 |
Boynton Commons | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 210,300 |
Gross Disposition Price |  | $ 50,000 |
Gain (Loss) on Sale, net |  | 18,405 |
Loss on Extinguishment of Debt |  | $ 0 |
Quebec Square | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 207,600 |
Gross Disposition Price |  | $ 42,250 |
Gain (Loss) on Sale, net |  | (800) |
Loss on Extinguishment of Debt |  | $ (2,092) |
Northwest Marketplace | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 185,200 |
Gross Disposition Price |  | $ 29,500 |
Gain (Loss) on Sale, net |  | 7,037 |
Loss on Extinguishment of Debt |  | $ 0 |
White Oak Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 564,700 |
Gross Disposition Price |  | $ 92,500 |
Gain (Loss) on Sale, net |  | 21,737 |
Loss on Extinguishment of Debt |  | $ 0 |
Woodbridge Crossing | Retail | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | ft² |  | 197,000 |
Gross Disposition Price |  | $ 45,600 |
Gain (Loss) on Sale, net |  | 794 |
Loss on Extinguishment of Debt |  | $ 0 |

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