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Goodwill Balances and Related Activity by Business Segment - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		1 Months Ended
	Oct. 26, 2013	Apr. 27, 2013	Aug. 22, 2013 Medical Restructuring	Oct. 26, 2013 Customer Lists	Oct. 26, 2013 Software	Oct. 26, 2013 Trade Names
Goodwill [Line Items]
Medical restructuring charges			$ 6,650
Non-cash losses on the sale of assets	(5,114)		5,114
Other intangible assets excluding goodwill	$ 76,892	$ 76,464		$ 32,756	$ 2,693	$ 48

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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