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Debt And Lines Of Credit , Narrative - Collateralized Term Loans (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 05, 2021
USD ($)
Jun. 28, 2021
USD ($)
Jun. 30, 2021
USD ($)
Rate
Mar. 31, 2021
USD ($)
Rate
Mar. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
loans
site
Rate
Dec. 31, 2019
USD ($)
Dec. 31, 2021
segment
Dec. 31, 2021
site
Dec. 31, 2021
Dec. 31, 2021
Rate
Dec. 31, 2021
loans
Dec. 31, 2021
properties
Nov. 13, 2021
USD ($)
Sep. 30, 2021
loans
Debt Instrument [Line Items]                                
Reduction in secured borrowing balance           $ 0 $ 0 $ 107,731                
Debt Instrument, Face Amount                             $ 1,300,000  
Repayments of Lines of Credit           $ 3,960,940 $ 1,361,538 3,883,950                
Weighted average interest rate | Rate             3.37%         3.038%        
Debt weighted average to maturity, length           8 years 9 months 18 days 9 years 4 months 24 days                  
Gain (Loss) on Extinguishment of Debt           $ 8,127 $ 5,209 $ 16,505                
Secured debt           $ 3,380,739 $ 3,489,983                  
Number of Units in Real Estate Property             45,800   204,163 15,816            
Long-term Line of Credit             $ 1,197,181                  
Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Debt Instrument, Face Amount         $ 230,000   $ 268,800                  
Weighted average interest rate             3.751%       3.779%          
Debt weighted average to maturity, length           10 years 7 months 6 days 11 years 4 months 24 days                  
Stated interest rate         2.995%   2.662%                  
Debt Instrument, Term         15 years   12 years                  
Collateralized Mortgage Backed Securities [Member]                                
Debt Instrument [Line Items]                                
Pledged Assets, Not Separately Reported, Real Estate           $ 3,100,000                    
Senior Unsecured Notes                                
Debt Instrument [Line Items]                                
Weighted average interest rate                     2.55%          
Debt weighted average to maturity, length           8 years 6 months                    
Proceeds from Issuance of Debt $ 595,500 $ 592,400                            
Manufactured home community [Member]                                
Debt Instrument [Line Items]                                
Number of Units in Real Estate Property | segment                 98,621              
Properties securing debt [Member] | Collateralized Mortgage Backed Securities [Member]                                
Debt Instrument [Line Items]                                
Number of properties securing a debt instument (in properties) | properties                           190    
Number of Units in Real Estate Property | site                   75,319            
Matures December 1, 2021, 5.98 Percent Interest Rate | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Reduction in secured borrowing balance     $ 52,710                          
Gain (Loss) on Extinguishment of Debt     $ (1,930,000)                          
Debt Instrument, Interest Rate, Effective Percentage | Rate     5.98%                          
Matures March 1, 2021, 5.837 Percent Interest Rate | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Reduction in secured borrowing balance       $ 99,607                        
Gain (Loss) on Extinguishment of Debt       $ (3,403,000)                        
Debt Instrument, Interest Rate, Effective Percentage | Rate       5.837%                        
Matures July 1, 2020, 5.83 Percent Interest Rate | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Reduction in secured borrowing balance       $ 19,922                        
Gain (Loss) on Extinguishment of Debt       $ 124,000                        
Debt Instrument, Interest Rate, Effective Percentage | Rate       5.83%                        
Collateralized Term Loan 1 [Member]                                
Debt Instrument [Line Items]                                
Number of Collateralized Term Loans | loans             3           2     4
Collateralized Term Loan 1 [Member] | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Debt Instrument, Face Amount           $ 8,800                    
Collateralized Term Loan 2 [Member]                                
Debt Instrument [Line Items]                                
Number of Collateralized Term Loans | loans             1                 2
Collateralized Term Loan 2 [Member] | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Debt Instrument, Face Amount           39,500                    
Collateralized Term Loan 3 [Member]                                
Debt Instrument [Line Items]                                
Number of Collateralized Term Loans | loans             2                 1
Collateralized Term Loan 3 [Member] | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Debt Instrument, Face Amount           $ 220,500                    
Matures December 1, 2022, 4.3 Percent Interest Rate | Secured Debt [Member]                                
Debt Instrument [Line Items]                                
Reduction in secured borrowing balance     $ 11,607                          
Gain (Loss) on Extinguishment of Debt     $ (19,000)                          
Debt Instrument, Interest Rate, Effective Percentage | Rate     4.30%