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Long-term debt - Summary of Principal Payment on Long Term Debt Including Obligation Under Capital Lease (Detail) - USD ($)
$ in Thousands
Mar. 28, 2015
Mar. 29, 2014
Debt Disclosure [Abstract]    
2016 $ 4,745  
2017 5,123  
2018 2,517  
2019 35,171  
2020 1,684  
Thereafter 7,544  
Long-term debt and Capital lease obligations $ 56,784 $ 54,750