CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid in Capital	Unallocated Shares of ESOP	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
Balances at Jul. 30, 2011	$ 869,667	$ 485	$ (708)	$ 345,036	$ (542)	$ 4,862	$ 520,534
Balances (in shares) at Jul. 30, 2011		48,520	27
Increase (Decrease) in Stockholders' Equity
Allocation of shares to ESOP	453				453
Stock option exercises and restricted stock vestings, net	6,044	5	708	5,386			(55)
Stock option exercises and restricted stock vestings, net (in shares)		491	(27)
Share-based compensation	11,372			11,372
Tax benefit associated with stock plans	2,804			2,804
Fair value of swap agreement, net of tax	763					763
Foreign currency translation	(3,729)					(3,729)
Net Income	91,342						91,342
Balances at Jul. 28, 2012	978,716	490	0	364,598	(89)	1,896	611,821
Balances (in shares) at Jul. 28, 2012		49,011	0
Increase (Decrease) in Stockholders' Equity
Allocation of shares to ESOP	50				50
Stock option exercises and restricted stock vestings, net	(1,542)	3		(1,545)
Stock option exercises and restricted stock vestings, net (in shares)		319
Share-based compensation	15,104			15,104
Tax benefit associated with stock plans	1,952			1,952
Fair value of swap agreement, net of tax	0
Foreign currency translation	(2,988)					(2,988)
Net Income	107,854						107,854
Balances at Aug. 03, 2013	1,099,146	493	0	380,109	(39)	(1,092)	719,675
Balances (in shares) at Aug. 03, 2013	49,330	49,330	0
Increase (Decrease) in Stockholders' Equity
Allocation of shares to ESOP	25				25
Stock Issued During Period, Shares, Acquisitions		112
Stock Issued During Period, Value, Acquisitions	7,104	1		7,103
Stock option exercises and restricted stock vestings, net	(1,542)	4		(1,546)
Stock option exercises and restricted stock vestings, net (in shares)		329
Share-based compensation	14,608			14,608
Tax benefit associated with stock plans	2,601			2,601
Fair value of swap agreement, net of tax	0
Foreign currency translation	(4,060)					(4,060)
Net Income	125,482						125,482
Balances at Aug. 02, 2014	$ 1,243,364	$ 498	$ 0	$ 402,875	$ (14)	$ (5,152)	$ 845,157
Balances (in shares) at Aug. 02, 2014	49,771	49,771	0