v2.4.0.6
Subsequent Events (Details) (USD $)
6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 21 Months Ended 1 Months Ended
Jun. 30, 2012
home
Jun. 30, 2011
Jun. 30, 2012
CEP II
Jun. 30, 2012
CEP II
Jul. 31, 2012
Subsequent Events
CEP II
Jul. 31, 2012
Subsequent Events
CEP II
Jul. 31, 2012
Subsequent Events
Avalon Del Rey Apartments
home
Jul. 31, 2012
Subsequent Events
Avalon Del Rey Apartments
Secured notes
Subsequent Events                
Number of apartment homes included in joint venture apartment communities owned 53,144           309  
Ownership interest acquired (as a percent)             30.00%  
Repayment of secured debt               $ 43,606,000
Acquisition of joint venture partner additional equity interest 3,350,000 6,570,000         67,200,000  
Ownership additional interest acquired (as a percent)             70.00%  
Common stock shares issued     1,119,892 1,119,892 315,323 3,925,980    
Shares sold, average sales price (in dollars per share)     $ 140.14 $ 140.14 $ 141.35 $ 127.36    
Net proceeds from sales of shares (in dollars) $ 175,682,000 $ 264,134,000 $ 154,588,000 $ 154,588,000 $ 43,901,000 $ 492,490,000