Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Consolidated Statements of Income [Abstract]
Net sales	$ 687,127	$ 682,712
Cost of sales, including warehousing and distribution expenses	500,359	491,585
Gross profit on sales	186,768	191,127
Operating, general, and administrative expenses	164,465	160,211
Income from operations	22,303	30,916
Investment income	753	977
Income before provision for income taxes	23,056	31,893
Provision for income taxes	8,290	11,764
Net income	$ 14,766	$ 20,129
Weighted-average shares outstanding, basic and diluted	26,898,443	26,898,443
Cash dividends per share	$ 0.30	$ 0.30
Basic and diluted earnings per share	$ 0.55	$ 0.75