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Long-term debt - Summary of Principal Payment on Long Term Debt Including Obligation Under Capital Lease (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2014
Mar. 30, 2013
Debt Disclosure [Abstract]    
2015 $ 4,537  
2016 5,196  
2017 2,822  
2018 2,119  
2019 29,986  
Thereafter 10,090  
Long-term debt and Capital lease obligations $ 54,750 $ 41,895