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Business Acquisitions (Fiscal Year 2017) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 01, 2017
Aug. 31, 2018
Business Acquisition [Line Items]    
Goodwill   $ 22,577
DMS    
Business Acquisition [Line Items]    
Goodwill   $ (8,186)
Lewis Engineering    
Business Acquisition [Line Items]    
Amount of cash paid for business acquisitions $ 31,400  
Assets acquired 32,300  
Goodwill 8,200  
Intangible assets acquired 14,600  
Liabilities assumed 900  
Transaction costs 800  
Lewis Engineering | DMS    
Business Acquisition [Line Items]    
Goodwill $ 8,200