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Stock-Based Compensation - Plans and Expense (Details) - USD ($)
$ in Thousands, shares in Millions
12 Months Ended
Apr. 30, 2022
Apr. 24, 2021
Apr. 25, 2020
Apr. 28, 2018
Stock-based compensation expense recognized for outstanding grants        
Equity-based awards expense $ 11,858 $ 12,671 $ 8,371  
Liability-based awards expense (1,131) 1,878 (982)  
Total stock-based compensation expense 10,727 14,549 7,389  
Stock options        
Stock-based compensation expense recognized for outstanding grants        
Equity-based awards expense 1,973 2,959 2,000  
Restricted stock awards        
Stock-based compensation expense recognized for outstanding grants        
Equity-based awards expense 3,720 3,367 2,913  
Stock appreciation rights        
Stock-based compensation expense recognized for outstanding grants        
Liability-based awards expense (102) 375 (240)  
Restricted stock units        
Stock-based compensation expense recognized for outstanding grants        
Equity-based awards expense 1,194 840 900  
Performance-based units        
Stock-based compensation expense recognized for outstanding grants        
Equity-based awards expense 4,971 5,505 2,558  
Deferred stock units issued to Directors        
Stock-based compensation expense recognized for outstanding grants        
Liability-based awards expense (1,058) 1,437 (768)  
Other        
Stock-based compensation expense recognized for outstanding grants        
Liability-based awards expense $ 29 $ 66 $ 26  
2017 Omnibus Incentive Plan        
Stock-Based Compensation        
Aggregate number of common shares that may be issued through awards (in shares)       5.9