CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011	Jun. 30, 2012	Jun. 25, 2011
Income Statement [Abstract]
Net sales	$ 1,291,899	$ 1,178,363	$ 2,312,316	$ 2,014,939
Cost of merchandise sold	840,438	775,866	1,528,055	1,338,836
Gross margin	451,461	402,497	784,261	676,103
Selling, general and administrative expenses	259,184	239,405	505,852	465,980
Depreciation and amortization	22,433	18,829	44,172	37,094
Operating income	169,844	144,263	234,237	173,029
Interest expense, net	31	217	614	460
Income before income taxes	169,813	144,046	233,623	172,569
Income tax expense	63,192	52,886	86,674	63,074
Net income	$ 106,621	$ 91,160	$ 146,949	$ 109,495
Net income per share - basic (in dollars per share)	$ 1.48	$ 1.27	$ 2.05	$ 1.51
Net income per share - diluted (in dollars per share)	$ 1.45	$ 1.23	$ 2.00	$ 1.47
Weighted average shares outstanding
Basic (in shares)	71,814	72,007	71,704	72,368
Diluted (in shares)	73,488	74,180	73,491	74,566
Dividends declared per common share outstanding (in dollars per share)	$ 0.20	$ 0.12	$ 0.32	$ 0.19