Capital Stock (Details) (USD $)	9 Months Ended		12 Months Ended	0 Months Ended	9 Months Ended
	Apr. 26, 2014	Apr. 27, 2013	Jul. 27, 2013	Aug. 27, 2013 Common Stock	Apr. 26, 2014 Common Stock
Class of Stock [Line Items]
Repurchase of common stock	360,900		1,047,000
Total Consideration (Dollars in thousands)	$ 9,999,000	$ 15,203,000	$ 15,203,000
Average Price Per Share (in dollars per share)	$ 27.71		$ 14.52
Common stock authorized repurchase amount				40,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount					30,000,000
Shares Paid for Tax Withholding for Share Based Compensation	130,195	47,277
Value of Shares Paid for Tax Withholding for Share Based Compensation	$ 3,600,000	$ 900,000