Income Taxes - Liability for Uncertain Tax Positions (Details) (USD $) In Thousands, unless otherwise specified	Jan. 26, 2014	Jan. 27, 2013
Income Tax Contingency [Line Items]
Liability for uncertain tax positions - current	$ 0	$ 188
Total accrued taxes	12,347	11,075
Noncurrent Deferred Tax Asset [Member]
Income Tax Contingency [Line Items]
Liability for uncertain tax positions - noncurrent	12,095	0
Other Liabilities [Member]
Income Tax Contingency [Line Items]
Liability for uncertain tax positions - noncurrent	$ 252	$ 10,887