Stock-Based Compensation, SARs (Details) - Jul. 25, 2015 - Stock Appreciation Rights - $ / shares	Total
Stock-Based Compensation
Percentage vesting each year from date of grant	25.00%
Period from grant date for first vesting	1 year
Vesting period	4 years
Fiscal 2014 Grant
Fair value assumptions
Risk-free interest rate (as a percent)	1.07%
Dividend rate (as a percent)	1.28%
Expected life in years	2 years 10 months 24 days
Stock price volatility (as a percent)	31.07%
Fair value per share (in dollars per share)	$ 7.76
Fiscal 2013 Grant
Fair value assumptions
Risk-free interest rate (as a percent)	0.69%
Dividend rate (as a percent)	1.28%
Expected life in years	1 year 11 months 23 days
Stock price volatility (as a percent)	28.82%
Fair value per share (in dollars per share)	$ 12.65