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Mortgage Loans Payable And Secured Revolving Credit Facilities (Summary Of The Derivative Financial Instruments Held) (Details) (USD $)
Dec. 31, 2012
contract
Dec. 31, 2011
contract
Debt Instrument [Line Items]    
Count 3 3
Notional values $ 31,417,000 $ 32,091,000
Fair value 1,577,000 2,053,000
Cedar/Rio Can Joint Venture [Member]
   
Debt Instrument [Line Items]    
Count   1
Notional values   14,182,000
Fair value   $ 2,419,000