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Cash, Cash Equivalents and Investments (Details 2) (Municipal bonds [Member], USD $) In Thousands, unless otherwise specified	Jul. 01, 2012
Municipal bonds [Member]
Gross unrealized losses and fair value for available-for-sale investments
Fair Value, Less than 12 months	$ 23,739
Unrealized Losses, Less than 12 months	(25)
Fair Value, 12 months or greater
Unrealized Losses, 12 months or greater
Fair Value	23,739
Unrealized Losses	$ (25)

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Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities.

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Amount of the excess of amortized cost basis over fair value of securities in a loss position and categorized neither as held-to-maturity nor trading securities.

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