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Property And Equipment (Schedule Of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2017
Property Plant And Equipment [Line Items]      
Subtotal $ 74,494 $ 62,790  
Less: accumulated depreciation and amortization (29,418) (26,433)  
Total [1] 45,076 36,357 $ 29,439
Machinery, Equipment and Vehicles [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 19,356 17,848  
Buildings And Improvements [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 17,391 17,100  
Computer And Office Equipment [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 5,328 5,046  
Software [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 10,189 9,481  
Furniture And Fixtures [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 2,039 1,820  
Capital In Progress [Member]      
Property Plant And Equipment [Line Items]      
Subtotal 16,747 8,042  
Land [Member]      
Property Plant And Equipment [Line Items]      
Subtotal $ 3,444 $ 3,453  
[1] Includes tangible assets and property and equipment, net, attributed to the geographic location in which such assets are located.