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Discontinued Operations (Schedule Of Properties Sold, Classified As Discontinued Operations) (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Feb. 02, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Sales Price |  |  | $ 4,075,000 | $ 52,975,000 |
Gain on sales |  |  |  | 7,963,000 |
Discontinued Operations [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Sales Price |  |  |  | 74,761,000 | $ 46,393,000
Gain on sales |  |  |  | $ 7,963,000 |
Discontinued Operations [Member] | East Chestnut [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Jan. 02, 2013
Sales Price |  |  |  |  | $ 3,100,000
Discontinued Operations [Member] | Columbia Mall [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Apr. 17, 2013
Sales Price |  |  |  |  | $ 2,775,000
Discontinued Operations [Member] | Heritage Crossings [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | May 09, 2013
Sales Price |  |  |  |  | $ 9,400,000
Discontinued Operations [Member] | Westlake Discount Drug Mart Plaza [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Jun. 05, 2013
Sales Price |  |  |  |  | $ 2,240,000
Discontinued Operations [Member] | Dunmore Shopping Center [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Nov. 08, 2013
Sales Price |  |  |  |  | $ 4,000,000
Discontinued Operations [Member] | Roosevelt II [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Nov. 14, 2013
Sales Price | [1] |  |  |  | $ 13,878,000
Discontinued Operations [Member] | Oakhurst Plaza [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  |  | Dec. 11, 2013
Sales Price |  |  |  |  | $ 11,000,000
Discontinued Operations [Member] | Huntingdon Plaza [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Sales Price |  | $ 2,200,000 |  |  |
Discontinued Operations [Member] | Harbor Square (f/k/a Shore Mall) [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  | Feb. 25, 2014 |
Sales Price |  |  |  | $ 25,000,000 |
Discontinued Operations [Member] | McCormick Place [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  | May 06, 2014 |
Sales Price | [1] |  |  | $ 2,679,000 |
Discontinued Operations [Member] | Gahanna Discount Drug Mart Plaza [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  | May 27, 2014 |
Sales Price | [1] |  |  | $ 4,982,000 |
Discontinued Operations [Member] | Townfair Center [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  | May 29, 2014 |
Sales Price |  |  |  | $ 22,600,000 |
Gain on sales |  |  |  | $ 1,472,000 |
Discontinued Operations [Member] | Lake Raystown Plaza [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Date Sold |  |  |  | Jun. 25, 2014 |
Sales Price |  |  |  | $ 19,500,000 |
Gain on sales |  |  |  | $ 6,491,000 |
[1] | Lender accepted a deed-in-lieu of foreclosure on the property. Sales price represents mortgage loan payable, accrued interest and other expenses forgiven upon title transfer.

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