5. Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 26, 2014	Oct. 26, 2013	Apr. 26, 2014	Jul. 27, 2013
Details
Total Income Tax Expense On Unrecognized Tax Benefits and Interest and Penalties For Prior Year		$ 10,052
Income Tax Expense Related To Unrecognized Tax Benefit For Prior Year		4,933
Federal Benefit on Unrecognized Tax Benefit For Prior Year		2,656
Income Tax Expense Related To Interest and Penalties For Prior Year		5,119
Federal Benefit on Tax Interest and Penalties For Prior Year		2,078
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	0		0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	26,790		26,790
Unrecognized Tax Benefits, Interest on Income Taxes Expense	680		9,653
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 15,473		$ 15,473	$ 5,820