Debt - Outstanding (Details) (USD $) In Thousands, unless otherwise specified	Apr. 26, 2014	Jul. 27, 2013	Dec. 12, 2012
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 413,238	$ 451,982
Debt premium	3,300	3,600
Less: current portion	10,156	7,813
Long-term debt	403,082	444,169
Revolving Credit Facility | Credit Agreement, December 3, 2012, Maturing December 2017
Debt Instrument [Line Items]
Debt and capital lease obligations	16,000	49,000
Senior Loans | Credit Agreement, December 3, 2012, Maturing December 2017
Debt Instrument [Line Items]
Debt and capital lease obligations	116,406	121,875
Senior Subordinated Notes | 7.125% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Debt and capital lease obligations	277,500	277,500
Debt premium	$ 3,332	$ 3,607	$ 3,800
Debt, interest rate (in percent)	0.00%	7.125%	7.125%