Annual report pursuant to Section 13 and 15(d)

Mortgages, Loans Payable And Other Obligations (Schedule Of Long Term Debt Principal Payment) (Details)

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Mortgages, Loans Payable And Other Obligations (Schedule Of Long Term Debt Principal Payment) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Mortgages, Loans Payable And Other Obligations [Abstract]    
Scheduled Amortization, 2012 $ 11,159,000  
Scheduled Amortization, 2013 11,315,000  
Scheduled Amortization, 2014 10,468,000  
Scheduled Amortization, 2015 8,941,000  
Scheduled Amortization, 2016 8,753,000  
Scheduled Amortization, Thereafter 26,992,000  
Scheduled Amortization, Sub-total 77,628,000  
Adjustment for unamortized debt discount/premium and mark-to market, net, as of December 31, 2011 (23,223,000)  
Scheduled Amortization, Total 54,405,000  
Principal Maturities, 2012 221,148,000  
Principal Maturities, 2013 145,223,000  
Principal Maturities, 2014 335,257,000  
Principal Maturities, 2015 205,500,000  
Principal Maturities, 2016 273,120,000  
Principal Maturities, Thereafter 679,562,000  
Principal Maturities, Sub-Total 1,859,810,000  
Principal Maturities, Total 1,859,810,000  
Total, 2012 232,307,000  
Total, 2013 156,538,000  
Total, 2014 345,725,000  
Total, 2015 214,441,000  
Total, 2016 281,873,000  
Total, Thereafter 706,554,000  
Total, Sub-total 1,937,438,000  
Total 1,914,215,000 2,089,494,000
Weighted Avg. Interest Rate of Future Repayments, 2012 6.05% [1]  
Weighted Avg. Interest Rate of Future Repayments, 2013 5.39% [1]  
Weighted Avg. Interest Rate of Future Repayments, 2014 6.82% [1]  
Weighted Avg. Interest Rate of Future Repayments, 2015 4.41% [1],[2]  
Weighted Avg. Interest Rate of Future Repayments, 2016 7.16% [1]  
Weighted Avg. Interest Rate of Future Repayments, Thereafter 7.15% [1]  
Total indebtedness, weighted average interest rate 6.46% [1] 5.97%
Percent of Company's outstanding debt used to calculate variable interest rates 0.29%  
Amortized deferred financing costs $ 2,600,000  
[1] The actual weighted average LIBOR rate for the Company's outstanding variable rate debt was 0.29 percent as of December 31, 2011.
[2] Excludes amortized deferred financing costs pertaining to the Company's unsecured revolving credit facility which amounted to $2.6 million for the year ended December 31, 2011.