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Marketable Securities (Tables) | 9 Months Ended
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Dec. 26, 2020
Marketable Securities [Abstract] |
Schedule of Available-for-sale Securities | The following table is a summary of available-for-sale securities at December 26, 2020 (in thousands):
As of December 26, 2020 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value (Net Carrying Amount)
Corporate debt securities | $ | 347,642 |  |  | $ | 5,484 |  |  | $ | (11) |  |  | $ | 353,115 |
Non-U.S. government securities | 12,681 |  |  | 218 |  |  | — |  |  | 12,899 |
Agency discount notes | 3,760 |  |  | 6 |  |  | — |  |  | 3,766 |
Total securities | $ | 364,083 |  |  | $ | 5,708 |  |  | $ | (11) |  |  | $ | 369,780 |
The following table is a summary of available-for-sale securities at March 28, 2020 (in thousands):
As of March 28, 2020 | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value (Net Carrying Amount)
Corporate debt securities | $ | 286,668 |  |  | $ | 1,157 |  |  | $ | (3,993) |  |  | $ | 283,832 |
Non-U.S. government securities | 12,483 |  |  | 260 |  |  | — |  |  | 12,743 |
U.S. Treasury securities | 8,839 |  |  | 167 |  |  | — |  |  | 9,006 |
Total securities | $ | 307,990 |  |  | $ | 1,584 |  |  | $ | (3,993) |  |  | $ | 305,581 |
Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity | The cost and estimated fair value of available-for-sale securities by contractual maturities were as follows (in thousands):
| December 26, 2020 |  | March 28, 2020
| Amortized |  | Estimated |  | Amortized |  | Estimated
| Cost |  | Fair Value |  | Cost |  | Fair Value
Within 1 year | $ | 42,680 |  |  | $ | 43,289 |  |  | $ | 22,012 |  |  | $ | 22,008 |
After 1 year | 321,403 |  |  | 326,491 |  |  | 285,978 |  |  | 283,573 |
Total | $ | 364,083 |  |  | $ | 369,780 |  |  | $ | 307,990 |  |  | $ | 305,581 |

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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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