CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balance at Jul. 30, 2010	$ 228	$ 6,200	$ (48,849)	$ 234,038	$ 191,617
Balance (in shares) at Jul. 30, 2010	22,732,781
Comprehensive Income:
Net income	0	0	0	85,208	85,208
Other comprehensive income, net of tax	0	0	10,817	0	10,817
Total comprehensive income	0	0	10,817	85,208	96,025
Cash dividends declared	0	0	0	(20,489)	(20,489)
Share-based compensation	0	9,796	0	0	9,796
Exercise of share-based compensation awards (in shares)	784,793
Exercise of share-based compensation awards	7	20,533	0	0	20,540
Tax benefit realized upon exercise of share-based compensation awards	0	4,108	0	0	4,108
Purchases and retirement of common stock (in shares)	(676,600)				(676,600)
Purchases and retirement of common stock	(7)	(33,556)	0	0	(33,563)
Balance at Jul. 29, 2011	228	7,081	(38,032)	298,757	268,034
Balance (in shares) at Jul. 29, 2011	22,840,974
Comprehensive Income:
Net income	0	0	0	103,081	103,081
Other comprehensive income, net of tax	0	0	16,874	0	16,874
Total comprehensive income	0	0	16,874	103,081	119,955
Cash dividends declared	0	0	0	(26,915)	(26,915)
Share-based compensation	0	14,420	0	0	14,420
Exercise of share-based compensation awards (in shares)	897,588
Exercise of share-based compensation awards	9	17,593	0	0	17,602
Tax benefit realized upon exercise of share-based compensation awards	0	4,502	0	0	4,502
Purchases and retirement of common stock (in shares)	(265,538)				(265,538)
Purchases and retirement of common stock	(3)	(14,920)	0	0	(14,923)
Balance at Aug. 03, 2012	234	28,676	(21,158)	374,923	382,675
Balance (in shares) at Aug. 03, 2012	23,473,024				23,473,024
Comprehensive Income:
Net income	0	0	0	117,265	117,265
Other comprehensive income, net of tax	0	0	14,546	0	14,546
Total comprehensive income	0	0	14,546	117,265	131,811
Cash dividends declared	0	0	0	(53,515)	(53,515)
Share-based compensation	0	17,839	0	0	17,839
Exercise of share-based compensation awards (in shares)	366,603
Exercise of share-based compensation awards	4	6,450	0	0	6,454
Tax benefit realized upon exercise of share-based compensation awards	0	2,332	0	0	2,332
Purchases and retirement of common stock (in shares)	(44,300)				(44,300)
Purchases and retirement of common stock	(1)	(3,569)	0	0	(3,570)
Balance at Aug. 02, 2013	$ 237	$ 51,728	$ (6,612)	$ 438,673	$ 484,026
Balance (in shares) at Aug. 02, 2013	23,795,327				23,795,327