Annual report pursuant to Section 13 and 15(d)

Mortgages, Loans Payable And Other Obligations (Schedule Of Principal Payments And Related Weighted Average Interest Rates Of Long Term Debt) (Details)

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Mortgages, Loans Payable And Other Obligations (Schedule Of Principal Payments And Related Weighted Average Interest Rates Of Long Term Debt) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Debt Disclosure [Abstract]    
Scheduled Amortization, 2013 $ 10,887,000  
Scheduled Amortization, 2014 10,185,000  
Scheduled Amortization, 2015 8,634,000  
Scheduled Amortization, 2016 8,425,000  
Scheduled Amortization, 2017 6,423,000  
Scheduled Amortization, Thereafter 6,195,000  
Scheduled Amortization, Sub-total 50,749,000  
Adjustment for unamortized debt discount premium and mark-to-market, net, as of December 21, 2012 (19,055,000)  
Scheduled Amortization, Total 31,694,000  
Principal Maturities, 2013 181,286,000  
Principal Maturities, 2014 335,257,000  
Principal Maturities, 2015 150,000,000  
Principal Maturities, 2016 273,120,000  
Principal Maturities, 2017 391,151,000  
Principal Maturities, Thereafter 841,881,000  
Principal Maturities, Total 2,172,695,000  
Total, 2013 192,173,000  
Total, 2014 345,442,000  
Total, 2015 158,634,000  
Total, 2016 281,545,000  
Total, 2017 397,574,000  
Total, Thereafter 848,076,000  
Total, Sub-total 2,223,444,000  
Total $ 2,204,389,000 $ 1,914,215,000
Weighted Avg. Interest Rate of Future Repayments, 2013 4.36%  
Weighted Avg. Interest Rate of Future Repayments, 2014 6.82%  
Weighted Avg. Interest Rate of Future Repayments, 2015 5.40%  
Weighted Avg. Interest Rate of Future Repayments, 2016 7.16%  
Weighted Avg. Interest Rate of Future Repayments, 2017 4.12%  
Weighted Avg. Interest Rate of Future Repayments, Thereafter 6.38%  
Long-term Debt, Weighted Average Interest Rate 5.86% 6.46%
Weighted average LIBOR rate 0.23%