Investments, Fair Value of Investments (Details) (Measured at Fair Value on a Recurring Basis [Member], USD $) In Thousands, unless otherwise specified	Dec. 25, 2011	Jun. 26, 2011
Investments [Abstract]
Corporate debt	$ 86,245	$ 56,015
U.S. government and agency obligations	83,134	142,070
Asset-backed securities	266	781
Equity securities-strategic investments	12,449	22,436
Total securities at fair value	182,094	221,302
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Investments [Abstract]
U.S. government and agency obligations	41,911	79,822
Equity securities-strategic investments	12,449	22,436
Total securities at fair value	54,360	102,258
Significant Other Observable Inputs (Level 2) [Member]
Investments [Abstract]
Corporate debt	86,245	56,015
U.S. government and agency obligations	41,223	62,248
Total securities at fair value	127,468	118,263
Significant Unobservable Inputs (Level 3) [Member]
Investments [Abstract]
Asset-backed securities	266	781
Total securities at fair value	$ 266	$ 781

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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