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Sale of Properties (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Sale of Properties |  |
Gross Sales Price | $ 24,750 | $ 40,611
Gain on Sales of Real Estate, Net | 9,837 | 9,824
Retail property, Greenwood Village, Colorado |  |
Sale of Properties |  |
Gross Sales Price | 9,500 |
Gain on Sales of Real Estate, Net | 6,568 |
Retail Property Kansas City, Missouri |  |
Sale of Properties |  |
Gross Sales Price | 10,250 |
Gain on Sales of Real Estate, Net | 2,180 |
Retail Property Niles Illinois |  |
Sale of Properties |  |
Gross Sales Price | 5,000 |
Gain on Sales of Real Estate, Net | $ 1,089 |
Portfolio of eight retail properties, Louisiana and Mississippi |  |
Sale of Properties |  |
Gross Sales Price |  | 13,750
Gain on Sales of Real Estate, Net |  | 787
Retail property, Killeen, Texas |  |
Sale of Properties |  |
Gross Sales Price |  | 3,100
Gain on Sales of Real Estate, Net |  | 980
Land, Sandy Springs, Georgia |  |
Sale of Properties |  |
Gross Sales Price |  | 8,808
Gain on Sales of Real Estate, Net |  | 2,281
Industrial property, Tomlinson, Pennsylvania |  |
Sale of Properties |  |
Gross Sales Price |  | 14,800
Gain on Sales of Real Estate, Net |  | 5,660
Partial condemnation of land, greenwood village, colorado |  |
Sale of Properties |  |
Gross Sales Price |  | 153
Gain on Sales of Real Estate, Net |  | $ 116

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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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