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Inventories (Tables)

6 Months Ended

Feb. 29, 2012

Inventories [Abstract]

Schedule Of Inventories

		February 29,			February 28,			August 31,
$ in thousands		2012			2011			2011
Inventory:
FIFO inventory	$	33,868		$	25,626		$	22,614
LIFO reserves		(7,026	)		(6,305	)		(7,178	)
LIFO inventory		26,842			19,321			15,436
Weighted average inventory		26,087			21,977			20,848
Other FIFO inventory		17,966			15,806			15,407
Obsolescence reserve		(2,317	)		(2,228	)		(2,167	)
Total inventories	$	68,578		$	54,876		$	49,524

Schedule Of Estimated Percentage Distribution

	February 29,		February 28,		August 31,
	2012		2011		2011
Raw materials	14	%	14	%	14	%
Work in process	7	%	10	%	8	%
Finished goods and purchased parts	79	%	76	%	78	%

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Percentage Distribution Between Major Classes Of Inventory [Text Block]

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- Definition

Tabular disclosure of the carrying 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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic

-SubTopic

-Publisher SEC

-Number 210

-Article 5

-Subparagraph a,b,c

-Name Regulation S-X (SX)

-Paragraph 6

-Section 2

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