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GOODWILL AND OTHER INTANGIBLE ASSETS (Intangible Assets) (Details) - USD ($)
$ in Thousands
Aug. 31, 2018
Aug. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 20,502 $ 19,702
Accumulated Amortization 6,480 6,922
Net 14,022 12,780
Customer base    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 6,254 6,334
Accumulated Amortization 3,416 2,660
Net 2,838 3,674
Favorable land leases    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 4,476 10,189
Accumulated Amortization 755 2,849
Net 3,721 7,340
Non-compete agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,750 1,750
Accumulated Amortization 798 578
Net 952 1,172
Brand name    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 928 1,328
Accumulated Amortization 662 770
Net 266 558
Patents    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 6,993 0
Accumulated Amortization 777 0
Net 6,216 0
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 101 101
Accumulated Amortization 72 65
Net $ 29 $ 36