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WATER AND LAND ASSETS, Service to Customers Not on the Lowry Range (Details)
$ in Thousands
 12 Months Ended
Aug. 31, 2010
USD ($)
a
acre ft
Aug. 31, 2021
USD ($)
a
item
Aug. 31, 2020
USD ($)
Jun. 30, 2017
USD ($)
Dec. 15, 2016
USD ($)
Service to Customers Not on the Lowry Range [Abstract]          
Area of land (in acres) | a   930      
Costs   $ 63,992 $ 60,537    
Sky Ranch Water Rights and Other Costs [Member]          
Service to Customers Not on the Lowry Range [Abstract]          
Area of land (in acres) | a 930        
Volume of water purchased | acre ft 830        
Capitalized costs $ 23,400        
Costs $ 7,600 7,338 7,499    
Wild Pointe Service Rights [Member]          
Service to Customers Not on the Lowry Range [Abstract]          
Costs   $ 1,632 1,632   $ 1,600
Percentage of wastewater tap fees recognized as income   100.00%      
Percentage of remaining gross revenue retained   98.00%      
Number of single family equivalent water connections | item   200      
Sky Ranch Pipeline [Member]          
Service to Customers Not on the Lowry Range [Abstract]          
Costs   $ 5,727 $ 5,727 $ 5,700