CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Income Statement [Abstract]
Net sales	$ 1,065,638	$ 977,776	$ 3,377,954	$ 2,992,715
Cost of merchandise sold	708,467	650,173	2,236,522	1,989,009
Gross margin	357,171	327,603	1,141,432	1,003,706
Selling, general and administrative expenses	257,184	239,883	763,036	705,863
Depreciation and amortization	22,208	19,591	66,380	56,685
Operating income	77,779	68,129	312,016	241,158
Interest expense, net	241	591	855	1,051
Income before income taxes	77,538	67,538	311,161	240,107
Income tax expense	27,517	24,805	114,191	87,879
Net income	$ 50,021	$ 42,733	$ 196,970	$ 152,228
Net income per share - basic (in dollars per share)	$ 0.71	$ 0.60	$ 2.76	$ 2.11
Net income per share - diluted (in dollars per share)	$ 0.69	$ 0.58	$ 2.69	$ 2.05
Weighted average shares outstanding
Basic (in shares)	70,741	71,226	71,383	71,988
Diluted (in shares)	72,313	73,343	73,098	74,158
Dividends declared per common share outstanding (in dollars per share)	$ 0.20	$ 0.12	$ 0.52	$ 0.31