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Acquisitions and Divestitures - Fiscal 2012 Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended				3 Months Ended	4 Months Ended	12 Months Ended				3 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 30, 2011	Oct. 31, 2011 Eetrex	Jul. 30, 2011 Eetrex	Apr. 30, 2011 Eetrex	Mar. 31, 2011 Eetrex	Apr. 27, 2013 Eetrex	Oct. 31, 2011 Eetrex	Apr. 27, 2013 Eetrex	Apr. 28, 2012 Eetrex	Apr. 27, 2013 Eetrex Minimum	Apr. 27, 2013 Eetrex Maximum	Oct. 29, 2011 Nypro Monterrey	Sep. 30, 2011 Nypro Monterrey employee
Business Acquisition [Line Items]
Value of pre-existing ownership interest in acquiree											$ 2,720
Percentage of pre-existing ownership interest in acquiree											70.00%
Payments to acquire additional interest in subsidiaries				480	600	650
Additional equity interests acquired, percentage						19.00%	36.00%		20.00%
Ownership percentage of subsidiary by parent				90.00%		70.00%			90.00%
Purchase price stipulated in option to purchase remaining equity interests, representing persentage of net sales in fiscal 2014 or 2016												2.00%	2.50%
Ownership percentage by noncontrolling owners								10.00%		10.00%
Increase in non-controlling interest due to an increase in the redemption amount								106
Amount transferred to mezzanine equity											615
Net loss attributable to noncontrolling interest	294	246	307							333	282
Mezzanine equity								0		0	333
Total consideration transferred															6,353
Number of employees transferred as part of acquisition															228
Fair value of 100% of the business based on third-party valuation							6,600								6,608
Gain on bargain purchase	$ 0	$ 255	$ 0											$ 255

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