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Employee Benefits - Further Information Related to Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 24, 2021
Apr. 25, 2020
Apr. 27, 2019
Non-Qualified Defined Benefit Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Discount rate used to determine obligation 3.00% 2.80%  
Actuarial loss recognized in AOCI $ 347 $ 218 $ 190
Benefit payments 1,091 1,091 $ 1,091
Other current liabilities | Performance Compensation Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan obligation included in liabilities 716 638  
Other long-term liabilities | Performance Compensation Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan obligation included in liabilities 15,194 12,492  
Other long-term liabilities | Executive Deferred Compensation Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan obligation included in other long-term liabilities 26,548 22,282  
Other long-term liabilities | Non-Qualified Defined Benefit Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan obligation included in liabilities 15,783 16,846  
Other long-term assets | Executive Deferred Compensation Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Cash surrender value on life insurance contracts included in other long-term assets 41,133 34,562  
Other current assets | Executive Deferred Compensation Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Mutual funds held by plan included in other current assets 10 $ 76  
Minimum | Non-Qualified Defined Benefit Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Annual benefit payments for the next 10 years 1,000    
Maximum | Non-Qualified Defined Benefit Retirement Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Annual benefit payments for the next 10 years $ 1,100