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Debt - Long-Term Debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 27, 2019
Apr. 28, 2018
Mar. 31, 2018
Debt Instrument [Line Items]      
Less: Deferred debt issuance costs $ (2,775) $ (3,005)  
Total 749,316 998,628  
Less: current debt obligations (23,975) (76,598)  
Long-term debt $ 725,341 922,030  
Senior notes due fiscal 2019      
Debt Instrument [Line Items]      
Fixed rate 2.95%    
Fixed rate senior notes $ 0 60,000  
Senior notes due fiscal 2022      
Debt Instrument [Line Items]      
Fixed rate 3.59%    
Fixed rate senior notes $ 165,000 165,000  
Senior notes due fiscal 2024      
Debt Instrument [Line Items]      
Fixed rate 3.74%    
Fixed rate senior notes $ 100,000 100,000  
Senior notes due fiscal 2025      
Debt Instrument [Line Items]      
Fixed rate 3.48%    
Fixed rate senior notes $ 250,000 250,000  
Senior notes due fiscal 2028      
Debt Instrument [Line Items]      
Fixed rate 3.79%    
Fixed rate senior notes $ 150,000 150,000 $ 150,000
Term loan due fiscal 2022      
Debt Instrument [Line Items]      
Fixed rate 3.73%    
Fixed rate senior notes $ 87,091 $ 276,633  
Term loan due fiscal 2022 | LIBOR      
Debt Instrument [Line Items]      
Interest rate 1.25%