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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Finite And Indefinite Intangible Assets [Line Items]    
Amortizable intangible assets: weighted average years 12 years 1 month 6 days 10 years
Total, gross carrying amount $ 77,173 $ 53,189
Amortizable intangible assets: accumulated amortization (25,253) (21,209)
Tradenames [Member]    
Finite And Indefinite Intangible Assets [Line Items]    
Unamortizable intangible assets: gross carrying amount $ 20,121 $ 13,122
Patents and Developed Technology [Member]    
Finite And Indefinite Intangible Assets [Line Items]    
Amortizable intangible assets: weighted average years 14 years 3 months 18 days 13 years
Amortizable intangible assets: gross carrying amount $ 33,741 $ 30,282
Amortizable intangible assets: accumulated amortization $ (16,473) $ (14,687)
Customer Relationships [Member]    
Finite And Indefinite Intangible Assets [Line Items]    
Amortizable intangible assets: weighted average years 12 years 2 months 12 days 7 years 4 months 24 days
Amortizable intangible assets: gross carrying amount $ 19,958 $ 7,932
Amortizable intangible assets: accumulated amortization $ (6,884) $ (5,304)
Non-compete Agreements [Member]    
Finite And Indefinite Intangible Assets [Line Items]    
Amortizable intangible assets: weighted average years 10 years 4 months 24 days 5 years 7 months 6 days
Amortizable intangible assets: gross carrying amount $ 2,343 $ 1,336
Amortizable intangible assets: accumulated amortization $ (1,044) $ (852)
Other Intangible Assets [Member]    
Finite And Indefinite Intangible Assets [Line Items]    
Amortizable intangible assets: weighted average years 1 year 10 months 24 days 1 year 7 months 6 days
Amortizable intangible assets: gross carrying amount $ 1,010 $ 517
Amortizable intangible assets: accumulated amortization $ (852) $ (366)