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Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Aug. 31, 2013	Nov. 30, 2012
Inventories [Abstract]
Raw materials and supplies	$ 20,386	$ 19,369	$ 14,447
Work in process	7,045	5,665	5,040
Finished goods and purchased parts	54,540	50,038	54,675
Total inventory value before LIFO adjustment	81,971	75,072	74,162
Less adjustment to LIFO value	(6,357)	(6,465)	(6,912)
Inventories, net	$ 75,614	$ 68,607	$ 67,250

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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