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Investments In Unconsolidated Joint Ventures And Entities (Summary Of The Investments In And Advances To Unconsolidated Joint Ventures And Entities) (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Rialto Distribution [Member] | Dec. 31, 2009 Rialto Distribution [Member] | Oct. 01, 2005 Rialto Distribution [Member] | Dec. 31, 2012 Rialto Cinemas [Member] | Dec. 31, 2011 Rialto Cinemas [Member] | Oct. 01, 2005 Rialto Cinemas [Member] | Dec. 31, 2012 205-209 East 57th Street Associates, LLC [Member] | Dec. 31, 2011 205-209 East 57th Street Associates, LLC [Member] | Dec. 31, 2012 Mt. Gravatt [Member] | Dec. 31, 2011 Mt. Gravatt [Member]
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Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity method investment |  |  | 33.30% |  | 33.30% | 50.00% |  |  | 25.00% |  | 33.30% |
Total investments | $ 7,715,000 | $ 7,839,000 |  | $ 0 |  | $ 1,561,000 | $ 1,586,000 | $ 50 | $ 60,000 | $ 33,000 | $ 6,094,000 | $ 6,220,000

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