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Selected Financial Statement Data - Accrued Expenses (Details) - USD ($)
$ in Thousands
May. 02, 2015
Apr. 26, 2014
Selected Financial Statement Data [Abstract]    
Compensation $ 12,137 $ 14,189
Taxes, other than income taxes 4,223 2,977
Other 9,703 6,296
Accrued expenses $ 26,063 $ 23,462