QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 01, 2015	May. 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	Feb. 01, 2014	Nov. 02, 2013	Aug. 01, 2015	Aug. 02, 2014		Aug. 03, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 2,061,313	$ 2,114,643	$ 2,016,546	$ 1,992,476	$ 1,764,666	$ 1,781,729	$ 1,646,041	$ 1,602,011	$ 8,184,978	$ 6,794,447		$ 6,064,355
Gross profit	316,406	325,914	299,199	318,996	290,173	298,129	268,167	271,176	1,260,515	1,127,645		1,025,076
Income before income taxes	59,560	69,571	46,023	54,615	53,896	60,653	46,586	46,273	229,769	207,408		174,116
Net Income	$ 36,098	$ 41,750	$ 27,844	$ 33,042	$ 33,375	$ 36,392	$ 27,951	$ 27,764	$ 138,734	$ 125,482		$ 107,854
Per common share income
Basic: (in dollars per share)	$ 0.72	$ 0.83	$ 0.56	$ 0.66	$ 0.67	$ 0.73	$ 0.56	$ 0.56
Net income (in dollars per share)									$ 2.77	$ 2.53	[1]	$ 2.19
Diluted: (in dollars per share)	$ 0.72	$ 0.83	$ 0.55	$ 0.66	$ 0.67	$ 0.73	$ 0.56	$ 0.56
Net income (in dollars per share)									$ 2.76	$ 2.52		$ 2.18
Weighted average basic shares of common stock	50,091	50,079	50,025	49,889	49,675	49,635	49,615	49,439	50,021	49,602		49,217
Weighted average diluted shares of common stock	50,330	50,348	50,277	50,113	49,972	49,931	49,873	49,735	50,267	49,888		49,509
High
Per common share income
Market Price (in dollars per share)	$ 69.26	$ 83.91	$ 80.77	$ 69.51	$ 69.85	$ 79.64	$ 76.85	$ 75.85	$ 83.91	$ 79.64
Low
Per common share income
Market Price (in dollars per share)	$ 45.26	$ 66.34	$ 67.71	$ 58.48	$ 58.04	$ 64.12	$ 66.74	$ 58.29	$ 45.26	$ 58.04

[1] Total reflects rounding