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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, 2016
Aug. 31, 2015
Jan. 22, 2015
Aug. 31, 2014
Business Acquisition [Line Items]        
Goodwill $ 76,803 $ 76,801   $ 37,021
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