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)
 6 Months Ended
Jun. 30, 2019
USD ($)
property
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]      
Number of properties with encumbered company mortgages | property 19    
Carrying value of encumbered properties $ 2,200,000,000    
Cash paid for interest 54,630,000 $ 41,354,000  
Interest capitalized 9,458,000 14,296,000  
Total indebtedness $ 2,705,896,000   $ 2,807,396,000
Total indebtedness, weighted average interest rate 3.93%   3.89%
Unconsolidated Joint Venture [Member]      
Debt Instrument [Line Items]      
Interest capitalized $ 627,000 $ 348,000  
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]      
Debt Instrument [Line Items]      
Total indebtedness $ 156,519,000   $ 314,177,000
Total indebtedness, weighted average interest rate 5.60%   4.90%
Fixed Rate Debt And Other Obligations [Member]      
Debt Instrument [Line Items]      
Total indebtedness $ 2,549,377,000   $ 2,493,219,000
Total indebtedness, weighted average interest rate 3.83%   3.76%