CEO Separation Costs (Details) (Former Chief Executive Officer, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 23, 2015	Apr. 24, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for payment	2 years
Remaining compensation obligations		$ 3,160
Selling, General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax charges	3,688