Discontinued Operations (Schedule Of Properties Sold, Classified As Discontinued Operations) (Details)	12 Months Ended
	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
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
Gain on sales	$ 7,963,000
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	$ 2,679,000	[1]
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	$ 4,982,000	[1]
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.