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Basis of Presentation (detail) - USD ($)
3 Months Ended 9 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 26, 2015
Dec. 27, 2014
Sales Revenue [Line Items]        
Net Sales $ 432,198,000 $ 456,207,000 $ 971,658,000 $ 1,008,411,000
Business Acquisition [Line Items]        
Relationship Transfer Agreement $ 24,275,000   24,275,000  
General Mills Operations Llc [Member]        
Sales Revenue [Line Items]        
Net Sales     $ 126,050,000 $ 138,641,000