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Discontinued Operations (Narrative) (Details) (USD $) | 9 Months Ended |  |  | 3 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | May 06, 2014 McCormick Place [Member] | May 27, 2014 Gahanna Discount Drug Mart Plaza [Member] | Jun. 30, 2014 Discontinued Operations [Member] McCormick Place [Member] | Jun. 30, 2014 Discontinued Operations [Member] Gahanna Discount Drug Mart Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Mortgage loans payable and accrued interest for properties under conveyance process |  |  | $ 2,700,000 | $ 5,000,000 |  |
Carrying value of property held for sale |  |  | 1,800,000 | 4,300,000 |  |
Gain on extinguishment of debt obligations | $ 1,423,000 | $ 1,298,000 |  |  | $ 800,000 | $ 600,000

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
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- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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