XML 51 R40.htm IDEA: XBRL DOCUMENT v3.8.0.1
GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2018
May 31, 2017
May 31, 2018
May 31, 2017
Aug. 31, 2017
Finite-Lived Intangible Assets [Line Items]          
Gross carrying amounts of the intangible assets subject to amortization $ 21,000   $ 21,000   $ 19,700
Amortization expense for intangible assets 600 $ 800 1,600 $ 1,800  
Impairment     (514)    
Americas Fabrication          
Finite-Lived Intangible Assets [Line Items]          
Impairment     (514)    
MMFX Technologies Corporation | Patents          
Finite-Lived Intangible Assets [Line Items]          
Finite-lived intangible assets acquired $ 7,000        
Useful life of intangible assets acquired 7 years 6 months        
Structural Steel Fabrication Operations          
Finite-Lived Intangible Assets [Line Items]          
Non-recurring impairment charge $ 900   $ 13,000