Capital Stock	6 Months Ended
Jan. 24, 2015
Stockholders' Equity Note [Abstract]
Capital Stock	Capital Stock During the three months ended January 24, 2015, the company repurchased 488,768 shares of its common stock in open market transactions, at an average price of $35.08 per share, for approximately $17.1 million under its share repurchase program. During fiscal 2014, the Company repurchased 360,900 shares of its common stock in open market transactions, at an average price of $27.71 per share, for approximately $10.0 million under its share repurchase program. All shares repurchased have been subsequently canceled. As of January 24, 2015, approximately $12.9 million of the $40.0 million authorized on August 27, 2013 remained authorized for repurchases through February 2015. On February 24, 2015, the Company announced that its Board of Directors authorized $40.0 million to repurchase shares of the Company's outstanding common stock through August 24, 2016 in open market or private transactions. The repurchase authorization replaces the Company's previous repurchase authorization described herein. As of February 24, 2015, the full $40.0 million remained available for repurchases. During the six months ended January 24, 2015 and January 25, 2014, the Company withheld 138,535 shares and 130,195 shares, respectively, of shares issued with respect to restricted units that vested during the periods, totaling $4.3 million and $3.6 million, respectively, in order to meet payroll tax withholdings obligations that arose on the vesting of restricted units. All shares withheld have been canceled. The shares withheld for tax withholdings do not reduce the Company’s total share repurchase authority.

Capital Stock

During the three months ended January 24, 2015, the company repurchased 488,768 shares of its common stock in open market transactions, at an average price of $35.08 per share, for approximately $17.1 million under its share repurchase program. During fiscal 2014, the Company repurchased 360,900 shares of its common stock in open market transactions, at an average price of $27.71 per share, for approximately $10.0 million under its share repurchase program. All shares repurchased have been subsequently canceled. As of January 24, 2015, approximately $12.9 million of the $40.0 million authorized on August 27, 2013 remained authorized for repurchases through February 2015. On February 24, 2015, the Company announced that its Board of Directors authorized $40.0 million to repurchase shares of the Company's outstanding common stock through August 24, 2016 in open market or private transactions. The repurchase authorization replaces the Company's previous repurchase authorization described herein. As of February 24, 2015, the full $40.0 million remained available for repurchases.

During the six months ended January 24, 2015 and January 25, 2014, the Company withheld 138,535 shares and 130,195 shares, respectively, of shares issued with respect to restricted units that vested during the periods, totaling $4.3 million and $3.6 million, respectively, in order to meet payroll tax withholdings obligations that arose on the vesting of restricted units. All shares withheld have been canceled. The shares withheld for tax withholdings do not reduce the Company’s total share repurchase authority.