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Marketable Securities | 12 Months Ended
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Mar. 28, 2015
Marketable Securities [Abstract] |
Marketable Securities | 3. Marketable Securities The Company’s investments that have original maturities greater than 90 days have been classified as available-for-sale securities in accordance with U.S. GAAP. Marketable securities are categorized on the C onsolidated B alance S heet as marketable securities, as appropriate. The following table is a summary of available-for-sale securities (in thousands):
|  |  |  |  |  |  |  |  |  | Estimated
|  |  |  | Gross |  | Gross |  | Fair Value
| Amortized |  | Unrealized |  | Unrealized |  | (Net Carrying
As of March 28, 2015 | Cost |  | Gains |  | Losses |  | Amount)
Corporate debt securities | $ | 153,896 |  | $ | 8 |  | $ | (68) |  | $ | 153,836
Commercial paper |  | 2,485 |  |  | 2 |  |  | - |  |  | 2,487
U.S. Treasury securities |  | 28,010 |  |  | - |  |  | (15) |  |  | 27,995
Total securities | $ | 184,391 |  | $ | 10 |  | $ | (83) |  | $ | 184,318
The Company’s specifically identified gross unrealized losses of $83 thousand relates to 34 different securities with a total amortized cost of approximately $154.3 million at March 28, 2015. Because the Company does not intend to sell the investments at a loss and the Company will not be required to sell the investments before recovery of its amortized cost basis, it did not consider the investment in these securities to be other-than-temporarily impaired at March 28, 2015. Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of March 28, 2015.
|  |  |  |  |  |  | Estimated
|  |  | Gross |  | Gross |  | Fair Value
| Amortized |  | Unrealized |  | Unrealized |  | (Net Carrying
As of March 29, 2014 | Cost |  | Gains |  | Losses |  | Amount)
Corporate debt securities | $ | 246,878 |  | $ | 52 |  | $ | (245) |  | $ | 246,685
U.S. Treasury securities |  | 56,986 |  |  | 10 |  |  | (2) |  |  | 56,994
Agency discount notes |  | 2,008 |  |  | 1 |  |  | - |  |  | 2,009
Commercial paper |  | 41,962 |  |  | 10 |  |  | (2) |  |  | 41,970
Certificates of deposit |  | 5,006 |  |  | - |  |  | (4) |  |  | 5,002
Total securities | $ | 352,840 |  | $ | 73 |  | $ | (253) |  | $ | 352,660
The Company’s specifically identified gross unrealized losses of $253 thousand relates to 74 different securities with a total amortized cost of approximately $207.8 millio n at March 29, 201 4. Because the Company does not intend to sell the investments at a loss and the Company will not be required to sell the investments before recovery of its amortized cost basis, it did not consider the investment in these securities to be other-than-temporarily impaired at March 29, 201 4. Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of March 29, 201 4. The cost and estimated fair value of available-for-sale investments by contractual maturity were as follows:
|  | March 28, 2015 |  | March 29, 2014
|  | Amortized |  | Estimated |  | Amortized |  | Estimated
|  | Cost |  | Fair Value |  | Cost |  | Fair Value
Within 1 year |  | $ | 124,275 |  | $ | 124,246 |  | $ | 263,418 |  | $ | 263,417
After 1 year |  |  | 60,116 |  |  | 60,072 |  |  | 89,422 |  |  | 89,243
Total |  | $ | 184,391 |  | $ | 184,318 |  | $ | 352,840 |  | $ | 352,660

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 + Details
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