CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Income Statement [Abstract]
Net sales	$ 6,779,579	$ 6,226,507	$ 5,711,715
Cost of merchandise sold	4,454,377	4,083,333	3,761,300
Gross profit	2,325,202	2,143,174	1,950,415
Selling, general and administrative expenses	1,488,164	1,369,097	1,246,308
Depreciation and amortization	142,958	123,569	114,635
Operating income	694,080	650,508	589,472
Interest expense, net	5,810	2,891	1,885
Income before income taxes	688,270	647,617	587,587
Income tax expense	251,150	237,222	216,702
Net Income	$ 437,120	$ 410,395	$ 370,885
Net income per share - basic (in dollars per share)	$ 3.29	$ 3.03	$ 2.69
Net income per share - diluted (in dollars per share)	$ 3.27	$ 3.00	$ 2.66
Weighted average shares outstanding
Basic (in shares)	132,905	135,582	137,769
Diluted (in shares)	133,813	136,845	139,435
Dividends declared per common share outstanding (in dollars per share)	$ 0.92	$ 0.76	$ 0.61