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Restricted Cash (Details) - USD ($)
$ in Thousands
Oct. 24, 2020
Apr. 25, 2020
Oct. 26, 2019
Apr. 27, 2019
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 350,949 $ 261,553 $ 117,569  
Restricted cash 2,478 1,975 1,972  
Total cash, cash equivalents and restricted cash $ 353,427 $ 263,528 $ 119,541 $ 131,787