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Share Repurchase Program (Details) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Apr. 29, 2017
Apr. 28, 2018
Jun. 17, 2016
Equity, Class of Treasury Stock [Line Items]      
Stock Repurchase Program, Authorized Amount     $ 40,000
Stock Repurchased During Period, Shares 284    
Stock Repurchased During Period, Value $ 1,825    
Stock Repurchase Program, Remaining Authorized Repurchase Amount   $ 38,175