Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Consolidated Statements of Income [Abstract]
Net sales	$ 661,412	$ 668,391	$ 2,006,196	$ 2,007,097
Cost of sales, including warehousing and distribution expenses	478,649	487,115	1,441,984	1,455,097
Gross profit on sales	182,763	181,276	564,212	552,000
Operating, general, and administrative expenses	164,919	154,814	477,835	459,800
Income from operations	17,844	26,462	86,377	92,200
Investment income	1,129	769	3,931	2,988
Other Income	0	0	0	414
Income before provision for income taxes	18,973	27,231	90,308	95,602
Provision for income taxes	7,281	10,053	34,308	35,195
Net income	$ 11,692	$ 17,178	$ 56,000	$ 60,407
Weighted-average shares outstanding, basic and diluted	26,898,443	26,898,443	26,898,443	26,898,443
Cash dividends per share	$ 0.3	$ 0.3	$ 0.9	$ 0.9
Basic and diluted earnings per share	$ 0.43	$ 0.64	$ 2.08	$ 2.25