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Note 11 - Geographic And Segment Information (Detail) - Net Sales By Geographic Location as a Percentage of Total Consolidated Net Sales:	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net Sales, Percentage	100.00%	100.00%	100.00%	100.00%
Inside the U.S.A to Unaffiliated Customers [Member]
Net Sales, Percentage	65.60%	58.90%	68.40%	63.30%
Joint Ventures In Which The Company Is A Shareholder Directly And Indirectly - Outside the U.S.A [Member]
Net Sales, Percentage	18.20%	11.90%	16.80%	13.70%
Unaffiliated Customers - Outside the U.S.A [Member]
Net Sales, Percentage	16.20%	29.20%	14.80%	23.00%

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration