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Acquisitions - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2011
Entity
acre
Location
Jun. 30, 2011
Jun. 30, 2011
Jun. 08, 2011
Business Acquisition [Line Items]        
Description of acquired property 31,167 sites on approximately 6,500 acres located in 16 states (primarily located in Florida and the northeastern region of the United States)      
Number of sites in which properties located 31,167      
Acres of land in which properties located 6,500      
Number of states in which properties located 16      
Purchase price $ 1,430,000,000      
Acquisition costs   2,117,000 2,117,000  
Acquisition escrow deposit 25,000,000 300,000,000 300,000,000 275,000,000
Number of pending acquisition 76      
Expected close date of remaining acquisition     Oct. 01, 2011  
Manufactured home communities
       
Business Acquisition [Line Items]        
Number of acquired portfolio 75      
RV resort
       
Business Acquisition [Line Items]        
Number of acquired portfolio 1      
Subsequent Event 1
       
Business Acquisition [Line Items]        
Purchase price   452,000,000 452,000,000  
Number of closed acquisition     35  
Acquisition date     Jul. 01, 2011  
Subsequent Event 2
       
Business Acquisition [Line Items]        
Purchase price   $ 436,000,000 $ 436,000,000  
Number of closed acquisition     16  
Acquisition date     Aug. 01, 2011