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Associate Retirement Plans - Summary of Fair Value Pension Plan Asset (Detail) - USD ($)
$ in Thousands
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 84,753 $ 93,718  
Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   29,851  
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 68,555 46,118  
Significant unobservable inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 16,198 17,749  
Mutual funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 9,401 29,851  
Mutual funds [Member] | Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value   29,851  
Mutual funds [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 9,401    
Pooled funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 58,355 45,737  
Pooled funds [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 58,355 45,737  
Money market fund [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 799 381  
Money market fund [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 799 381  
Guaranteed annuity contract [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 16,198 17,749  
Guaranteed annuity contract [Member] | Significant unobservable inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 16,198 $ 17,749 $ 18,071