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Selected Financial Statement Data - Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 26, 2014
Apr. 27, 2013
Selected Financial Statement Data [Abstract]    
Compensation $ 14,189 $ 12,940
Taxes, other than income taxes 2,977 2,534
Other 6,296 8,857
Accrued expenses $ 23,462 $ 24,331