CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Income Statement [Abstract]
Net sales	$ 1,721,704	$ 1,542,706	$ 5,303,544	$ 4,863,037
Cost of merchandise sold	1,121,248	1,007,432	3,480,177	3,184,097
Gross profit	600,456	535,274	1,823,367	1,678,940
Selling, general and administrative expenses	410,276	357,592	1,198,126	1,076,180
Depreciation and amortization	41,927	35,662	122,701	103,296
Operating income	148,253	142,020	502,540	499,464
Interest expense, net	3,752	1,110	9,621	4,145
Income before income taxes	144,501	140,910	492,919	495,319
Income tax expense	52,605	51,466	180,063	181,782
Net income	$ 91,896	$ 89,444	$ 312,856	$ 313,537
Net income per share – basic	$ 0.73	$ 0.67	$ 2.44	$ 2.35
Net income per share – diluted	$ 0.72	$ 0.67	$ 2.43	$ 2.33
Weighted average shares outstanding:
Basic	126,416	133,392	128,293	133,529
Diluted	126,919	134,256	128,910	134,509
Dividends declared per common share outstanding	$ 0.27	$ 0.24	$ 0.78	$ 0.68