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Disposed Properties - Schedule of Disposal Groups (Details) ft² in Thousands, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) ft² | Mar. 31, 2017 USD ($) ft² | Dec. 31, 2017 ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ | $ 127,500 | $ 29,050 |
Square Feet | 3,000 | 300 | 3,200
Retail |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Square Feet | 11,200 | 12,700 | 12,400
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ | $ 127,500 |  |
Square Feet | 1,007 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail | Sherman Town Center I & II, Dallas-Fort Worth, TX |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ | $ 63,000 |  |
Square Feet | 485 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail | Grafton Commons, Milwaukee-Racine-Waukesha, WI |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ | $ 33,500 |  |
Square Feet | 239 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail | Lakeport Commons, Sioux City - Vermillion, IA-SD |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gross Disposition Price | $ | $ 31,000 |  |
Square Feet | 283 |  |

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