Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 26, 2011
Consolidated Statements of Income
Net sales	$ 661,610	$ 659,455
Cost of sales, including warehousing and distribution expenses	478,485	480,951
Gross profit on sales	183,125	178,504
Operating, general, and administrative expenses	152,695	150,251
Income from operations	30,430	28,253
Investment income	1,057	1,091
Income before provision for income taxes	31,487	29,344
Provision for income taxes	11,461	10,743
Net income	$ 20,026	$ 18,601
Weighted-average shares outstanding, basic and diluted	26,898,443	26,898,443
Cash dividends per share	$ 0.3	$ 0.29
Basic and diluted earnings per share	$ 0.74	$ 0.69