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Marketable Securities (Tables) | 12 Months Ended
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Mar. 30, 2013
Marketable Securities [Abstract] |
Schedule Of Available-for-sale Securities |
|  |  |  |  |  |  |  |  |  |  | Estimated
|  |  |  |  | Gross |  |  | Gross |  |  | Fair Value
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | (Net Carrying
As of March 30, 2013 |  | Cost |  |  | Gains |  |  | Losses |  |  | Amount)
Corporate debt securities | $ | 94,798 |  | $ | 2 |  | $ | (133) |  | $ | 94,667
U.S. Treasury securities |  | 34,380 |  |  | 4 |  |  | (3) |  |  | 34,381
Agency discount notes |  | 1,027 |  |  | - |  |  | - |  |  | 1,027
Commercial paper |  | 40,089 |  |  | 9 |  |  | (28) |  |  | 40,070
Total securities | $ | 170,294 |  | $ | 15 |  | $ | (164) |  | $ | 170,145
|  |  |  |  |  |  | Estimated
|  |  | Gross |  | Gross |  | Fair Value
| Amortized |  | Unrealized |  | Unrealized |  | (Net Carrying
As of March 31, 2012 | Cost |  | Gains |  | Losses |  | Amount)
Corporate debt securities | $ | 48,011 |  | $ | 33 |  | $ | (19) |  | $ | 48,025
U.S. Treasury securities |  | 30,264 |  |  | 1 |  |  | (4) |  |  | 30,261
Agency discount notes |  | 16,789 |  |  | 8 |  |  | (1) |  |  | 16,796
Commercial paper |  | 23,719 |  |  | 5 |  |  | (15) |  |  | 23,709
Total securities | $ | 118,783 |  | $ | 47 |  | $ | (39) |  | $ | 118,791
Schedule of Cost And Estimated Fair Value Of Available-for-sale Securities By Contractual Maturity |
|  |  | March 30, 2013 |  |  | March 31, 2012
|  |  | Amortized |  |  | Estimated |  |  | Amortized |  |  | Estimated
|  |  | Cost |  |  | Fair Value |  |  | Cost |  |  | Fair Value
Within 1 year |  | $ | 105,290 |  | $ | 105,235 |  | $ | 115,871 |  | $ | 115,876
After 1 year |  |  | 65,004 |  |  | 64,910 |  |  | 2,912 |  |  | 2,915
Total |  | $ | 170,294 |  | $ | 170,145 |  | $ | 118,783 |  | $ | 118,791

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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