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Fair Value Measurements (Quantitative Information Regarding Level 3 Assets Measured At Fair Value On Non-recurring Basis) (Details) (USD $) |  |  |  |  | 9 Months Ended |  | 9 Months Ended
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Sep. 30, 2012 property | Dec. 31, 2011 | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] | Dec. 31, 2011 Fair Value, Inputs, Level 3 [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Valuation Technique [Member] Minimum [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Valuation Technique [Member] Maximum [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Discounted Cash Flow Valuation Technique [Member] Weighted Average [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Sales Comparison Approach Valuation Technique [Member] Minimum [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Sales Comparison Approach Valuation Technique [Member] Maximum [Member] | Sep. 30, 2012 Fair Value, Inputs, Level 3 [Member] Sales Comparison Approach Valuation Technique [Member] Weighted Average [Member] | Sep. 30, 2012 Operating retail real estate [Member] Fair Value, Inputs, Level 3 [Member] property | Sep. 30, 2012 Land [Member] Fair Value, Inputs, Level 3 [Member] item
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate held for sale/conveyance | $ 194,174,000 | $ 206,674,000 | [1] | $ 71,931,000 | $ 82,520,000 |  |  |  |  |  |  | $ 62,620,000 | $ 9,311,000
Capitalization rates |  |  |  |  |  | 7.50% | 11.30% | 9.80% |  |  |  |  |
Discount rates |  |  |  |  |  | 11.50% | 12.00% | 11.60% |  |  |  |  |
Price per acre |  |  |  |  |  |  |  |  | 29,000 | 217,000 | 118,000 |  |
Number of parcels of land |  |  |  |  |  |  |  |  |  |  |  |  | 6
Number of properties | 67 |  |  |  |  |  |  |  |  |  |  | 9 |
[1] | Excludes $0.9 million relating to a property subsequently treated as "held for sale/conveyance".

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- Definition Fair Value Inputs Price Per Acre + References No definition available. + Details
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- Definition Number Of Parcels Of Land + References No definition available. + Details
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- Definition Real Estate Held For Sale Fair Value + References No definition available. + Details
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- Details
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- Definition Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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