Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Deferred tax assets:
Nondeductible reserves	$ 1,962	$ 7,267
Inventories	123,507	112,286
Property and equipment	3,322	0
Bad debt allowance	6,965	7,600
Accrued expenses	20,351	17,068
Employee benefits	181,148	176,307
Tax credits	22,567	34,051
Net operating loss and other tax carryforwards	124,052	94,975
Other	20,355	13,372
Gross deferred tax assets	504,229	462,926
Less valuation allowances	(67,451)	(61,358)	$ (43,757)	$ (32,131)
Deferred tax assets	436,778	401,568
Deferred Tax Liabilities, Net [Abstract]
Property and equipment	0	439
Derivatives	5,103	3,612
Intangibles	12,226	17,751
Prepaids	5,728	5,316
Deferred tax liabilities	23,057	27,118
Net deferred tax assets	$ 413,721	$ 374,450