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Restructuring (Narrative) (detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 29, 2012
Dec. 31, 2011
Restructuring Charges [Abstract]        
Plant Restructuring $ 2,510 $ 0 $ 2,510 $ 39