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Real Estate Acquisitions and Dispositions Real Estate Acquisitions, Carefree Narrative (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 09, 2016
USD ($)
sites
$ / shares
shares
Mar. 30, 2016
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
shares
Nov. 30, 2015
USD ($)
shares
Dec. 31, 2016
properties
sites
states
shares
Sep. 30, 2016
shares
Jun. 30, 2016
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Sep. 30, 2015
shares
Jun. 30, 2015
shares
Mar. 31, 2015
shares
Dec. 31, 2016
USD ($)
properties
sites
states
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 22, 2016
manufactured_home
Nov. 26, 2014
properties
Business Acquisition [Line Items]                                
Number of Real Estate Properties | properties         341             341        
Number of Units in Real Estate Property | sites         117,376             117,376        
Number of States in which Entity Operates | states         29             29        
New shares issued (in shares) | shares   6,037,500 3,737,500 3,737,500 19,498,000 620,828,000 485,000,000 6,037,500 608,100,000 26,200,000 342,011,000          
Proceeds from Issuance or Sale of Equity                       $ 750,385 $ 310,301 $ 572,171    
Share Price | $ / shares   $ 66.50           $ 66.50                
Proceeds from Issuance of Common Stock   $ 385,400 $ 283,600 $ 233,100       $ 385,400                
Carefree Communities                                
Business Acquisition [Line Items]                                
Number of Shares | shares 3,329,880                              
Cash, proceeds from dispositions held in escrow, or contingent liability $ 1,684,140                              
Business Acquisition, Share Price | $ / shares $ 67.57                              
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 225,000                              
Payments to Acquire Businesses, Gross 1,455,000                              
Business Combination, Consideration Transferred, Pay Off of Debt $ 1,000,000                              
Manufactured Home And Rv Community [Member]                                
Business Acquisition [Line Items]                                
Number of Real Estate Properties | properties         28             28        
Manufactured Home And Rv Community [Member] | Carefree Communities                                
Business Acquisition [Line Items]                                
Number of Units in Real Estate Property | manufactured_home                             103  
Number of Sites in Community | sites 27,000                              
Manufactured home community [Member]                                
Business Acquisition [Line Items]                                
Number of Real Estate Properties | properties         226             226       59
Number of Units in Real Estate Property | sites         80,166             80,166