Goodwill And Other Intangible Assets (Schedule Of Intangible Assets Finite and Infinite Excluding Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Finite And Indefinite Intangible Assets [Line Items]
Amortizable intangible assets: weighted average years	5 years 8 months 12 days	6 years 8 months 12 days
Total, gross carrying amount	$ 76,387	$ 77,173
Amortizable intangible assets: accumulated amortization	(29,187)	(25,253)
Tradenames [Member]
Finite And Indefinite Intangible Assets [Line Items]
Unamortizable intangible assets: gross carrying amount	$ 20,114	$ 20,121
Patents and Developed Technology [Member]
Finite And Indefinite Intangible Assets [Line Items]
Amortizable intangible assets: weighted average years	6 years 1 month 6 days	7 years 3 months 18 days
Amortizable intangible assets: gross carrying amount	$ 33,732	$ 33,741
Amortizable intangible assets: accumulated amortization	$ (18,893)	$ (16,473)
Customer Relationships [Member]
Finite And Indefinite Intangible Assets [Line Items]
Amortizable intangible assets: weighted average years	6 years	8 years
Amortizable intangible assets: gross carrying amount	$ 19,952	$ 19,958
Amortizable intangible assets: accumulated amortization	$ (8,747)	$ (6,884)
Non-compete Agreements [Member]
Finite And Indefinite Intangible Assets [Line Items]
Amortizable intangible assets: weighted average years	2 years 2 months 12 days	5 years 9 months 18 days
Amortizable intangible assets: gross carrying amount	$ 2,350	$ 2,343
Amortizable intangible assets: accumulated amortization	$ (1,450)	$ (1,044)
Other Intangible Assets [Member]
Finite And Indefinite Intangible Assets [Line Items]
Amortizable intangible assets: weighted average years	9 years 6 months	3 months 18 days
Amortizable intangible assets: gross carrying amount	$ 239	$ 1,010
Amortizable intangible assets: accumulated amortization	$ (97)	$ (852)