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Real Estate (Narrative) (Details) - USD ($) |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 02, 2016 | May 04, 2016 | Feb. 25, 2016 | Feb. 11, 2016 | Sep. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Purchase price of acquired property |  |  |  |  |  | $ 31,928,000 | $ 24,453,000
Shoppes at Arts District [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Purchase price of acquired property |  |  | $ 20,500,000 |  |  |  |
Mortgage interest rate |  |  | 5.20% |  |  |  |
Mortgage maturity date |  |  | Apr. 01, 2022 |  |  |  |
Shoppes at Arts District [Member] | Parent Company [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Purchase price of acquired property |  |  | $ 8,500,000 |  |  |  |
Glenwood Village [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Purchase price of acquired property |  | $ 19,500,000 |  |  |  |  |
Liberty Marketplace [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of real estate sold |  |  |  | $ 15,000,000 |  |  |
Upland Square [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Impairment charges |  |  |  |  | $ 6,300,000 | $ 6,300,000 |
Upland Square [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of real estate sold | $ 83,300,000 |  |  |  |  |  |

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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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