5. Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 25, 2014	Oct. 26, 2013	Jan. 25, 2014	Jul. 27, 2013
Details
Total Income Tax Expense On Unrecognized Tax Benefits and Interest and Penalties For Prior Year		$ 10,052	$ 10,052
Income Tax Expense Related To Unrecognized Tax Benefit For Prior Year		4,933	4,933
Federal Benefit on Unrecognized Tax Benefit For Prior Year		2,656	2,656
Income Tax Expense Related To Interest and Penalties For Prior Year		5,119	5,119
Federal Benefit on Tax Interest and Penalties For Prior Year		2,078	2,078
Unrecognized Tax Benefits, Interest on Income Taxes Expense	586		8,973
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 14,793		$ 14,793	$ 5,820