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Long-Term Debt and Lines of Credit (Detail) - USD ($)
$ in Thousands
May. 03, 2015
Apr. 27, 2014
Debt Disclosure [Abstract]    
unsecured senior term notes $ 2,200 $ 4,400
current maturities of long-term debt $ (2,200) (2,200)
long-term debt, less current maturities   $ 2,200