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Segmented Information - Schedule of Reconciliations of Segments Gross Profits and Certain Unallocated Costs to Consolidated Gross Profits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 26, 2016
Mar. 28, 2015
Mar. 29, 2014
Segment Reporting [Abstract]      
Unadjusted gross profit $ 112,714 $ 123,518 $ 119,873
Inventory provisions (2,084) (3,151) (3,010)
Other unallocated costs (1,630) (2,551) (2,801)
Adjustment of intercompany profit 387 (11) 605
Gross profit $ 109,387 $ 117,805 $ 114,667