CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid in Capital	Unallocated Shares of ESOP	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
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	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
Increase (Decrease) in Stockholders' Equity
Allocation of shares to ESOP	$ 14				14
Stock option exercises and restricted stock vestings, net	985	$ 3		982
Stock option exercises and restricted stock vestings, net (in shares)		325
Share-based compensation	13,981			13,981
Tax benefit associated with stock plans	2,746			2,746
Fair value of swap agreement, net of tax	(439)					(439)
Foreign currency translation	(13,852)					(13,852)
Net Income	138,734						$ 138,734
Balances at Aug. 01, 2015	$ 1,385,533	$ 501	$ 0	$ 420,584	$ 0	$ (19,443)	$ 983,891
Balances (in shares) at Aug. 01, 2015	50,096	50,096	0