CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 10, 2014	May 04, 2013	May 10, 2014	May 04, 2013
Statement Of Income And Comprehensive Income [Abstract]
Pension liability adjustments, taxes	$ 630	$ 1,296	$ 1,898	$ 4,489
Unrealized (losses) gains on marketable securities, taxes	7	7	85	24
Net derivative activities, taxes	$ 17	$ 150	$ 48	$ 408