Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014		Aug. 31, 2013		Aug. 31, 2012
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 2,853	[1]	$ 1,717	[1]	$ 2,340	[1]
Charges to costs and expenses	2,225	[1]	1,543	[1]	379	[1]
Deductions	221	[1]	407	[1]	1,002	[1]
Balance at end of period	4,857	[1]	2,853	[1]	1,717	[1]
Allowance For Inventory Obsolescence [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	3,089	[2]	1,648	[2]	2,167	[2]
Charges to costs and expenses	698	[2]	2,632	[2]	1,114	[2]
Charged to other accounts	11	[2]	71	[2]	(126)	[2]
Deductions	941	[2]	1,262	[2]	1,507	[2]
Balance at end of period	$ 2,858	[2]	$ 3,089	[2]	$ 1,648	[2]

[1] Deductions consist of uncollectible items

[2] Deductions consist of obsolete items sold