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Sales of Properties (Details) - USD ($) $ in Thousands |  |  |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 14, 2018 | Jan. 30, 2018 | Aug. 31, 2017 | Jul. 14, 2017 | May 08, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Nov. 30, 2017
Sales of Properties |  |  |  |  |  |  |  |  |
Total sales price, net of closing costs |  |  |  |  |  | $ 17,417 | $ 24,093 |  |
Sale of real estate |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  |  |  |  | 17,659 | 24,750 |  |
Gain on Sales of Real Estate, Net |  |  |  |  |  | $ 6,993 | $ 9,837 |  |
Sale of real estate | Retail Property, Fort Bend, Texas |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price |  | $ 9,200 |  |  |  |  |  |  |
Gain on Sales of Real Estate, Net |  | 2,408 |  |  |  |  |  |  |
Sale of real estate | Retail Property, Fort Bend, Texas | Non-Controlling Interests in Consolidated Joint Ventures |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Non-controlling interest's share of the gain |  | $ 776 |  |  |  |  |  |  |
Sale of real estate | Land, Lakemoor, Illinois |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price | $ 8,459 |  |  |  |  |  |  |  |
Gain on Sales of Real Estate, Net | 4,585 |  |  |  |  |  |  |  |
Fixed rental payment received and recorded as deferred income | $ 5,717 |  |  |  |  |  |  |  | $ 5,906
Sale of real estate | Retail property, Greenwood Village, Colorado |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  |  |  | $ 9,500 |  |  |  |
Gain on Sales of Real Estate, Net |  |  |  |  | $ 6,568 |  |  |  |
Sale of real estate | Retail Property, Kansas City, Missouri |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  |  | $ 10,250 |  |  |  |  |
Gain on Sales of Real Estate, Net |  |  |  | $ 2,180 |  |  |  |  |
Sale of real estate | Retail Property, Niles Illinois |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Gross Sales Price |  |  | $ 5,000 |  |  |  |  |  |
Gain on Sales of Real Estate, Net |  |  | $ 1,089 |  |  |  |  |  |
Consolidated JV | Sale of real estate | Retail Property, Fort Bend, Texas | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |
Sales of Properties |  |  |  |  |  |  |  |  |
Ownership interest in consolidated joint venture of the company (as a percent) |  | 85.00% |  |  |  |  |  | 85.00% |

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