Associate Retirement Plans - Summary of Fair Value Pension Plan Asset (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Defined Benefit Plan Disclosure [Line Items]
Total fair value	$ 81,982	$ 84,753
Total net asset value	64,684	67,756
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	1,872	799
Significant unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	15,426	16,198
Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	14,178	9,401
Total net asset value	14,178	9,401
Pooled funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	50,506	58,355
Total net asset value	50,506	58,355
Money market fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	1,872	799
Money market fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	1,872	799
Guaranteed annuity contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	15,426	16,198
Guaranteed annuity contract [Member] | Significant unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total fair value	$ 15,426	$ 16,198	$ 17,749