Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Income Statement [Abstract]
Sales	$ 3,926,885	$ 3,778,505	$ 3,748,973
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below)	2,026,367	1,963,153	1,950,633
Selling, distribution and administrative expenses	1,464,236	1,381,527	1,368,289
Depreciation and amortization	140,869	132,175	128,961
Pension plan settlement loss	6,646		15,387
Impairment of assets	24,877	3,771	10,308
Income from operations	263,890	297,879	275,395
Interest expense	34,905	26,815	28,288
Interest income	(20,552)	(21,967)	(20,947)
Income before income taxes	249,537	293,031	268,054
Income tax expense	85,761	103,840	92,315
Net income	$ 163,776	$ 189,191	$ 175,739
Basic:
Net income per common share	$ 0.79	$ 0.90	$ 0.84
Weighted average shares outstanding	208,511	210,793	209,683
Diluted:
Net income per common share	$ 0.78	$ 0.89	$ 0.82
Weighted average shares outstanding	210,354	213,356	213,092
Cash dividends paid per common share	$ 0.6250	$ 0.5675	$ 0.4850