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Selected Financial Statement Data - Accrued Expenses (Details) - USD ($)
$ in Thousands
Apr. 30, 2016
May 02, 2015
Selected Financial Statement Data [Abstract]    
Compensation $ 12,065 $ 12,137
Taxes, other than income taxes 3,969 4,223
Other 7,498 9,703
Accrued expenses $ 23,532 $ 26,063