v2.4.0.6
Related Party Arrangements (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Related Party Arrangements      
Compensation expense $ 9,961,000 $ 9,721,000 $ 9,906,000
Unconsolidated real estate entities
     
Related Party Arrangements      
Asset management, property management, development and redevelopment fee revenue 10,257,000 9,656,000 7,354,000
Receivables associated with management fees 3,484,000 4,294,000  
Non-employee directors
     
Related Party Arrangements      
Payable to related parties 60,000    
Payable to related parties in quarterly installments 15,000    
Non-employee directors | Restricted stock and deferred stock awards
     
Related Party Arrangements      
Payable to related parties 125,000    
Compensation expense 880,000 778,000 802,000
Amount of deferred compensation 364,000 370,000  
Lead Independent Director
     
Related Party Arrangements      
Payable to related parties 30,000    
Payable to related parties in quarterly installments $ 7,500