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Associate Retirement Plans - Summary of Fair Value Pension Plan Asset (Detail) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 74,241 $ 81,255  
Mutual funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 20,124 18,194  
Pooled funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 29,576 48,133  
Money market fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 11,992 1,037  
Guaranteed annuity contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 12,549 13,891 $ 15,426
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 11,992 1,037  
Level 2 [Member] | Money market fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 11,992 1,037  
Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 12,549 13,891  
Level 3 [Member] | Guaranteed annuity contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 12,549 13,891  
NAV      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 49,700 66,327  
NAV | Mutual funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 20,124 18,194  
NAV | Pooled funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 29,576 $ 48,133