Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Income Statement [Abstract]
Net sales	$ 903,069	$ 766,415	$ 2,662,728	$ 2,232,831
Cost of sales, buying and occupancy	641,612	540,367	1,879,839	1,558,876
Gross profit	261,457	226,048	782,889	673,955
Direct store expenses	177,990	148,633	518,561	430,019
Selling, general and administrative expenses	27,075	24,015	74,492	69,594
Store pre-opening costs	1,825	3,684	7,105	7,051
Store closure and exit costs	167	60	1,711	393
Income from operations	54,400	49,656	181,020	166,898
Interest expense	(3,685)	(6,157)	(13,990)	(19,144)
Other income	171	281	345	477
Loss on extinguishment of debt		(1,138)	(5,481)	(1,138)
Income before income taxes	50,886	42,642	161,894	147,093
Income tax provision	(18,900)	(16,577)	(61,119)	(57,144)
Net income	$ 31,986	$ 26,065	$ 100,775	$ 89,949
Net income per share:
Basic	$ 0.21	$ 0.17	$ 0.66	$ 0.60
Diluted	$ 0.21	$ 0.17	$ 0.65	$ 0.58
Weighted average shares outstanding:
Basic	153,585	150,241	153,071	149,227
Diluted	155,952	154,306	155,841	153,879