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Operating Results of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Discontinued Operations:
Net sales		$ 119,436	$ 83,903	$ 338,619
Operating income (loss) of discontinued operations	(716)	3,587	(5,280)	8,103
Pre-tax gain on disposal of discontinued business			7,079
Impairment charges		11,525		11,525
Income (loss) before income taxes	(716)	(7,938)	1,799	(3,422)
Income tax benefit	(713)	(2,982)	(1,886)	(1,582)
Income (loss) from discontinued operations, net of taxes	$ (3)	$ (4,956)	$ 3,685	$ (1,840)

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Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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