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Marketable Securities - Available-for-sale by Maturity Date (Details) (USD $) In Thousands, unless otherwise specified	Jul. 27, 2013
Schedule of Available-for-sale Securities
Less than 12 months	$ 8,870
Greater than 12 months	15,766
Total	24,636
Certificates of deposit
Schedule of Available-for-sale Securities
Less than 12 months	1,718
Greater than 12 months	2,959
Total	4,677
U.S. Government securities
Schedule of Available-for-sale Securities
Less than 12 months	3,011
Greater than 12 months	1,999
Total	5,010
U.S. Government sponsored entities
Schedule of Available-for-sale Securities
Less than 12 months	0
Greater than 12 months	4,249
Total	4,249
Municipal obligations
Schedule of Available-for-sale Securities
Less than 12 months	4,141
Greater than 12 months	6,559
Total	$ 10,700

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Available-for-sale Securities, Debt Maturities, After One Year, Fair Value

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Amount of available-for-sale debt securities at fair value maturing in the next fiscal year following the latest fiscal year.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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