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. 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
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
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	897,588
Issuance of share-based compensation awards, net of shares withheld for employee taxes	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)
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
Comprehensive Income:
Net income	0	0	0	117,265	117,265
Other comprehensive income, net of tax	0	0	14,546	0	14,546
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
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	366,603
Issuance of share-based compensation awards, net of shares withheld for employee taxes	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)
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
Comprehensive Income:
Net income	0	0	0	132,128	132,128
Other comprehensive income, net of tax	0	0	1,879	0	1,879
Comprehensive income	0	0	1,879	132,128	134,007
Cash dividends declared	0	0	0	(77,634)	(77,634)
Share-based compensation	0	7,924	0	0	7,924
Issuance of share-based compensation awards, net of shares withheld for employee taxes (in shares)	145,900				145,900
Issuance of share-based compensation awards, net of shares withheld for employee taxes	2	(8,459)	0	0	(8,457)
Tax benefit realized upon exercise of share-based compensation awards	0	1,248	0	0	1,248
Purchases and retirement of common stock (in shares)	(120,000)
Purchases and retirement of common stock	(1)	(12,472)	0	0	(12,473)
Balance at Aug. 01, 2014	$ 238	$ 39,969	$ (4,733)	$ 493,167	$ 528,641
Balance (in shares) at Aug. 01, 2014	23,821,227				23,821,227