CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 26, 2013	Jul. 28, 2012
Statement of Financial Position [Abstract]
Accounts receivable, allowance (in dollars)	$ 7,022	$ 6,249
Intangible assets, accumulated amortization (in dollars)	$ 12,236	$ 10,809
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	5,000,000	5,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	100,000,000	100,000,000
Common stock, issued shares	49,295,000	49,011,000
Common stock, outstanding shares	49,295,000	49,011,000