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Fair Value of Financial Instruments (Schedule of Fair Value of Financial Assets) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 29, 2014 | Mar. 30, 2013
--- | --- | ---
Cash Equivalents [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | $ 22,334 | $ 56,262
Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 20,456 | 54,762
Cash Equivalents [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 1,878 | 1,500
Cash Equivalents [Member] | Money-Market Funds [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 20,456 | 54,762
Cash Equivalents [Member] | Money-Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 20,456 | 54,762
Cash Equivalents [Member] | Commercial Paper [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 1,878 | 1,500
Cash Equivalents [Member] | Commercial Paper [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 1,878 | 1,500
Available-for-sale Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 352,660 | 170,145
Available-for-sale Securities [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 56,994 | 34,381
Available-for-sale Securities [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 295,666 | 135,764
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 246,685 | 94,667
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 246,685 | 94,667
Available-for-sale Securities [Member] | U.S. Treasury Securities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 56,994 | 34,381
Available-for-sale Securities [Member] | U.S. Treasury Securities [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 56,994 | 34,381
Available-for-sale Securities [Member] | Agency Discount Notes [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 2,009 | 1,027
Available-for-sale Securities [Member] | Agency Discount Notes [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 2,009 | 1,027
Available-for-sale Securities [Member] | Commercial Paper [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 41,970 | 40,070
Available-for-sale Securities [Member] | Commercial Paper [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 41,970 | 40,070
Available-for-sale Securities [Member] | Certificates of Deposit [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | 5,002 |
Available-for-sale Securities [Member] | Certificates of Deposit [Member] | Significant Other Observable Inputs Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of financial assets | $ 5,002 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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