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Acquisitions (Schedule Of Estimated Fair Value Of The Assets Acquired And Liabilities Assumed In Business Acquisition) (Details) - USD ($)
$ in Thousands
Aug. 31, 2015
Jan. 22, 2015
Aug. 31, 2014
Aug. 31, 2013
Business Acquisition [Line Items]        
Goodwill $ 76,801   $ 37,021 $ 37,414
Elecsys [Member]        
Business Acquisition [Line Items]        
Cash and cash equivalents   $ 3,401    
Receivables   2,006    
Inventories   8,467    
Other current assets   1,527    
Property and equipment   6,457    
Intangible assets   24,490    
Goodwill   39,986    
Other long-term assets   41    
Accounts payable and accrued liabilities   (2,862)    
Current and long-term debt   (2,478)    
Other long-term liabilities   (10,458)    
Total cash consideration   70,577    
Total cash consideration, net of cash acquired   67,176    
Total purchase price   $ 69,654