| Investments In Unconsolidated Joint Ventures (12 Vreeland Associates, L.L.C.) (Narrative) (Details) (12 Vreeland Associates, L.L.C. [Member], USD $) | 9 Months Ended | 
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| Sep. 30, 2013
 sqft | |
| 12 Vreeland Associates, L.L.C. [Member] | |
| Schedule of Equity Method Investments [Line Items] | |
| Percentage of interest in venture | 50.00% | 
| Area of property (in square feet) | 139,750 | 
| Mortgage loans, carrying amount | $ 15,800,000 | 
| Interest rate | 2.87% | 
| Mortgage loan, maturity date | July 2023 | 
| Distribution of loan proceeds | 14,800,000 | 
| Share of distribution of loan proceeds | $ 7,400,000 | 
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- Definition Distribution Of Loan Proceeds No definition available. 
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- Definition Mortgage Loan Maturity Date No definition available. 
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- Definition Share Of Distribution Of Loan Proceeds No definition available. 
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- Definition Area of a real estate property. No definition available. 
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The carrying amount of the outstanding balance due under the mortgage loan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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