Sale Of Businesses - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
Apr. 30, 2010	Jul. 31, 2010
Discontinued Operations [Line Items]
Costs related to closure of business		$ 3,640
Pre-tax loss on sale of business	323
Cost Of Products Sold For Inventory And Warranty
Discontinued Operations [Line Items]
Costs related to closure of business		1,710
Severance And Other Costs
Discontinued Operations [Line Items]
Costs related to closure of business		$ 1,930

The charge against earnings in the period, comprised of costs incurred associated with an exit or disposal activity other than for a discontinued operations as defined under generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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