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Property And Equipment (Schedule Of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
Nov. 30, 2020
Aug. 31, 2020
Property Plant And Equipment [Line Items]    
Subtotal $ 96,027 $ 93,038
Less: accumulated depreciation and amortization (33,420) (32,279)
Total 62,607 60,759
Machinery, Equipment And Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 20,452 20,434
Buildings And Improvements [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 28,334 28,271
Computer And Office Equipment [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 5,529 5,420
Software [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 10,101 9,959
Furniture And Fixtures [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 2,643 2,641
Capital In Progress [Member]    
Property Plant And Equipment [Line Items]    
Subtotal 24,597 21,939
Land [Member]    
Property Plant And Equipment [Line Items]    
Subtotal $ 4,371 $ 4,374