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 $)
 6 Months Ended
Jun. 30, 2014
property
Jun. 30, 2013
Dec. 31, 2013
Debt Instrument [Line Items]      
Number of properties with encumbered company mortgages 27    
Book value of encumbered properties $ 879,000,000    
Cash paid for interest 61,999,000 60,838,000  
Interest capitalized 6,493,000 6,748,000  
Total indebtedness 2,208,268,000   2,362,766,000
Total indebtedness, weighted average interest rate 5.51%   5.62%
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]
      
Debt Instrument [Line Items]      
Total indebtedness 164,363,000   80,228,000
Total indebtedness, weighted average interest rate 2.11%   2.74%
Fixed Rate Debt And Other Obligations [Member]
      
Debt Instrument [Line Items]      
Total indebtedness 2,043,905,000   2,282,538,000
Total indebtedness, weighted average interest rate 5.78%   5.72%
Unconsolidated Joint Venture [Member]
      
Debt Instrument [Line Items]      
Interest capitalized $ 1,953,000 $ 584,000