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Associate Retirement Plans - Summary of Fair Value Pension Plan Asset (Detail) - USD ($)
$ in Thousands
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 1,496 $ 74,241  
Mutual funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   20,124  
Pooled funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   29,576  
Money market fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 1,496 11,992  
Guaranteed annuity contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   12,549 $ 13,891
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 1,496 11,992  
Level 2 [Member] | Money market fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 1,496 11,992  
Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   12,549  
Level 3 [Member] | Guaranteed annuity contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   12,549  
NAV      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   49,700  
NAV | Mutual funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   20,124  
NAV | Pooled funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   $ 29,576