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Subsequent Events (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Nov. 05, 2020
$ / shares
Oct. 29, 2020
USD ($)
active_water_connection
Nov. 05, 2019
$ / shares
Sep. 30, 2020
$ / shares
Jun. 30, 2020
$ / shares
Mar. 31, 2020
$ / shares
Sep. 30, 2019
$ / shares
Jun. 30, 2019
$ / shares
Sep. 30, 2020
$ / shares
Sep. 30, 2019
$ / shares
May 04, 2020
Apr. 30, 2020
USD ($)
Apr. 20, 2018
USD ($)
Subsequent Event [Line Items]                          
Dividends declared per common share       $ 0.07 $ 0.07 $ 0.07 $ 0.07 $ 0.07 $ 0.22 $ 0.21      
monthly dividends declared [Member]                          
Subsequent Event [Line Items]                          
Dividends declared per common share     $ 0.0241                    
annual dividends declared [Member]                          
Subsequent Event [Line Items]                          
Dividends declared per common share     $ 0.2892                    
Subsequent Event [Member]                          
Subsequent Event [Line Items]                          
Business combination, consideration transferred | $   $ 80                      
Active water connections | active_water_connection   60                      
Subsequent Event [Member] | monthly dividends declared [Member]                          
Subsequent Event [Line Items]                          
Dividends declared per common share $ 0.02434                        
Subsequent Event [Member] | annual dividends declared [Member]                          
Subsequent Event [Line Items]                          
Dividends declared per common share $ 0.29208                        
Revolving Credit Facility [Member]                          
Subsequent Event [Line Items]                          
Line of Credit Facility, Maximum Borrowing Capacity | $                       $ 10,000 $ 8,000
Debt instrument, interest rate                     2.00%   2.25%