Quarterly report pursuant to Section 13 or 15(d)

Mortgages, Loans Payable And Other Obligations (Narrative) (Details)

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Mortgages, Loans Payable And Other Obligations (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2014
property
Mar. 31, 2013
Dec. 31, 2013
Debt Instrument [Line Items]      
Number of properties with encumbered company mortgages 30    
Book value of encumbered properties $ 898,000,000    
Cash paid for interest 36,119,000 36,200,000  
Interest capitalized 3,141,000 3,467,000  
Total indebtedness 2,232,287,000   2,362,766,000
Total indebtedness, weighted average interest rate 5.54%   5.62%
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]
     
Debt Instrument [Line Items]      
Total indebtedness 150,653,000   80,228,000
Total indebtedness, weighted average interest rate 2.04%   2.74%
Fixed Rate Debt And Other Obligations [Member]
     
Debt Instrument [Line Items]      
Total indebtedness 2,081,634,000   2,282,538,000
Total indebtedness, weighted average interest rate 5.79%   5.72%
Unconsolidated Joint Venture [Member]
     
Debt Instrument [Line Items]      
Interest capitalized $ 918,000 $ 298,000