Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Mortgages, Loans Payable And Other Obligations (Narrative) (Details)
 12 Months Ended
Dec. 31, 2015
USD ($)
property
item
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]      
Cash paid for interest $ 115,123,000 $ 119,664,000 $ 123,213,000
Interest capitalized 16,217,000 15,470,000 12,885,000
Total indebtedness $ 2,154,920,000 $ 2,088,654,000  
Total indebtedness, weighted average interest rate 5.22% 5.64%  
Projects Under Development And Developable Land [Member]      
Debt Instrument [Line Items]      
Number of projects with encumbered company mortgages | item 4    
Carrying value of encumbered properties $ 215,000,000    
Other Property [Member]      
Debt Instrument [Line Items]      
Number of properties with encumbered company mortgages | property 23    
Carrying value of encumbered properties $ 739,000,000    
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]      
Debt Instrument [Line Items]      
Total indebtedness $ 292,399,000 $ 159,860,000  
Total indebtedness, weighted average interest rate 2.81% 3.83%  
Fixed Rate Debt And Other Obligations [Member]      
Debt Instrument [Line Items]      
Total indebtedness $ 1,862,521,000 $ 1,928,794,000  
Total indebtedness, weighted average interest rate 5.60% 5.79%  
Unconsolidated Joint Venture [Member]      
Debt Instrument [Line Items]      
Interest capitalized $ 5,325,000 $ 4,646,000 $ 1,326,000