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Investments & Fair Value Measurements (Tables) | 6 Months Ended
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Apr. 01, 2016
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract] |
Schedule Of Financial Assets and Liabilities Carried At Fair Value |
| April 1, 2016
| Cost | Unrealized |  |  | Estimated Fair Value
| Gains | Losses | Total |  | Level 1 | Level 2 | Level 3
Cash and cash equivalents: |  |  |  |  |  |  |  |
Cash | $ | 494,964 |  |  |  | $ | 494,964 |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market funds | 26,238 |  | — |  | — |  | 26,238 |  |  | 26,238 |  |  |
Cash and cash equivalents | 521,202 |  | — |  | — |  | 521,202 |  |  | 26,238 |  | — |  | — |
Short-term investments: |  |  |  |  |  |  |  |
Commercial paper | 13,867 |  | 22 |  | (7 | ) | 13,882 |  |  |  | 13,882 |  |
Corporate bonds | 71,851 |  | — |  | (51 | ) | 71,800 |  |  |  | 71,800 |  |
Municipal debt securities | 18,591 |  | 8 |  | (14 | ) | 18,585 |  |  |  | 18,585 |  |
Short-term investments | 104,309 |  | 30 |  | (72 | ) | 104,267 |  |  | — |  | 104,267 |  | — |
Long-term investments: |  |  |  |  |  |  |  |
Certificate of deposit (1) | 13,000 |  | — |  | (15 | ) | 12,985 |  |  |  | 12,985 |  |
U.S. agency securities | 11,631 |  | 39 |  | (1 | ) | 11,669 |  |  | 11,669 |  |  |
Government bonds | 14,483 |  | 70 |  | (1 | ) | 14,552 |  |  | 14,552 |  |  |
Corporate bonds | 189,585 |  | 810 |  | (197 | ) | 190,198 |  |  |  | 190,198 |  |
Municipal debt securities | 35,033 |  | 121 |  | (22 | ) | 35,132 |  |  |  | 35,132 |  |
Other long-term investments (2) | 3,046 |  | 509 |  | — |  | 3,555 |  |  | 509 |  |  |  |
Long-term investments | 266,778 |  | 1,549 |  | (236 | ) | 268,091 |  |  | 26,730 |  | 238,315 |  | — |
Total cash, cash equivalents, and investments | $ | 892,289 |  | $ | 1,579 |  | $ | (308 | ) | $ | 893,560 |  |  | $ | 52,968 |  | $ | 342,582 |  | $ | — |
Investments held in supplemental retirement plan: |  |  |  |  |  |  |  |
Assets | 2,404 |  |  |  | 2,404 |  |  | 2,404 |  |  |
Included in prepaid expenses and other current assets & other non-current assets |  |  |  |  |
Liabilities | 2,404 |  |  |  | 2,404 |  |  | 2,404 |  |  |
Included in accrued liabilities & other non-current liabilities |  |  |  |  |
Contingent consideration related to acquisition: |  |  |  |  |  |  |  |
Liabilities | 95 |  |  |  | 95 |  |  |  |  |  | 95 |
Included in accrued liabilities |  |  |  |  |
(1) | The certificate of deposit includes marketable securities, and has a maturity in excess of one year as of April 1, 2016.
(2) | Other long-term investments as of April 1, 2016 include a marketable equity security of $0.5 million, and other investments that are not carried at fair value including an equity method investment of $0.6 million and two cost method investments of $2.0 million and $0.5 million.
Our cash and investment portfolio, which is recorded as cash equivalents and both short and long-term investments, consists of the following (in thousands):
| April 1, 2016
| Cost | Unrealized |  |  | Estimated Fair Value
| Gains | Losses | Total |  | Level 1 | Level 2 | Level 3
Cash and cash equivalents: |  |  |  |  |  |  |  |
Cash | $ | 494,964 |  |  |  | $ | 494,964 |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market funds | 26,238 |  | — |  | — |  | 26,238 |  |  | 26,238 |  |  |
Cash and cash equivalents | 521,202 |  | — |  | — |  | 521,202 |  |  | 26,238 |  | — |  | — |
Short-term investments: |  |  |  |  |  |  |  |
Commercial paper | 13,867 |  | 22 |  | (7 | ) | 13,882 |  |  |  | 13,882 |  |
Corporate bonds | 71,851 |  | — |  | (51 | ) | 71,800 |  |  |  | 71,800 |  |
Municipal debt securities | 18,591 |  | 8 |  | (14 | ) | 18,585 |  |  |  | 18,585 |  |
Short-term investments | 104,309 |  | 30 |  | (72 | ) | 104,267 |  |  | — |  | 104,267 |  | — |
Long-term investments: |  |  |  |  |  |  |  |
Certificate of deposit (1) | 13,000 |  | — |  | (15 | ) | 12,985 |  |  |  | 12,985 |  |
U.S. agency securities | 11,631 |  | 39 |  | (1 | ) | 11,669 |  |  | 11,669 |  |  |
Government bonds | 14,483 |  | 70 |  | (1 | ) | 14,552 |  |  | 14,552 |  |  |
Corporate bonds | 189,585 |  | 810 |  | (197 | ) | 190,198 |  |  |  | 190,198 |  |
Municipal debt securities | 35,033 |  | 121 |  | (22 | ) | 35,132 |  |  |  | 35,132 |  |
Other long-term investments (2) | 3,046 |  | 509 |  | — |  | 3,555 |  |  | 509 |  |  |  |
Long-term investments | 266,778 |  | 1,549 |  | (236 | ) | 268,091 |  |  | 26,730 |  | 238,315 |  | — |
Total cash, cash equivalents, and investments | $ | 892,289 |  | $ | 1,579 |  | $ | (308 | ) | $ | 893,560 |  |  | $ | 52,968 |  | $ | 342,582 |  | $ | — |
Investments held in supplemental retirement plan: |  |  |  |  |  |  |  |
Assets | 2,404 |  |  |  | 2,404 |  |  | 2,404 |  |  |
Included in prepaid expenses and other current assets & other non-current assets |  |  |  |  |
Liabilities | 2,404 |  |  |  | 2,404 |  |  | 2,404 |  |  |
Included in accrued liabilities & other non-current liabilities |  |  |  |  |
Contingent consideration related to acquisition: |  |  |  |  |  |  |  |
Liabilities | 95 |  |  |  | 95 |  |  |  |  |  | 95 |
Included in accrued liabilities |  |  |  |  |
(1) | The certificate of deposit includes marketable securities, and has a maturity in excess of one year as of April 1, 2016.
(2) | Other long-term investments as of April 1, 2016 include a marketable equity security of $0.5 million, and other investments that are not carried at fair value including an equity method investment of $0.6 million and two cost method investments of $2.0 million and $0.5 million.
| September 25, 2015
| Cost | Unrealized |  |  | Estimated Fair Value
| Gains | Losses | Total |  | Level 1 | Level 2 | Level 3
Cash and cash equivalents: |  |  |  |  |  |  |  |
Cash | $ | 511,736 |  |  |  | $ | 511,736 |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market funds | 19,014 |  | — |  | — |  | 19,014 |  |  | 19,014 |  |  |
Corporate bonds | 1,176 |  | — |  | — |  | 1,176 |  |  |  | 1,176 |  |
Cash and cash equivalents | 531,926 |  | — |  | — |  | 531,926 |  |  | 19,014 |  | 1,176 |  | — |
Short-term investments: |  |  |  |  |  |  |  |
Government bonds | 2,000 |  | 1 |  | — |  | 2,001 |  |  | 2,001 |  |  |
Commercial paper | 6,478 |  | — |  | — |  | 6,478 |  |  |  | 6,478 |  |
Corporate bonds | 86,543 |  | 46 |  | (11 | ) | 86,578 |  |  |  | 86,578 |  |
Municipal debt securities | 43,746 |  | 98 |  | — |  | 43,844 |  |  |  | 43,844 |  |
Short-term investments | 138,767 |  | 145 |  | (11 | ) | 138,901 |  |  | 2,001 |  | 136,900 |  | — |
Long-term investments: |  |  |  |  |  |  |  |
U.S. agency securities | 1,999 |  | 1 |  | — |  | 2,000 |  |  | 2,000 |  |  |
Government bonds | 30,505 |  | 19 |  | (17 | ) | 30,507 |  |  | 30,507 |  |  |
Corporate bonds | 167,394 |  | 138 |  | (392 | ) | 167,140 |  |  |  | 167,140 |  |
Municipal debt securities | 117,552 |  | 189 |  | (60 | ) | 117,681 |  |  |  | 117,681 |  |
Other long-term investments (1) | 2,961 |  | 726 |  | — |  | 3,687 |  |  | 726 |  |  |
Long-term investments | 320,411 |  | 1,073 |  | (469 | ) | 321,015 |  |  | 33,233 |  | 284,821 |  | — |
Total cash, cash equivalents, and investments | $ | 991,104 |  | $ | 1,218 |  | $ | (480 | ) | $ | 991,842 |  |  | $ | 54,248 |  | $ | 422,897 |  | $ | — |
Investments held in supplemental retirement plan: |  |  |  |  |  |  |
Assets | 2,498 |  |  |  | 2,498 |  |  | 2,498 |  |  |
Included in prepaid expenses and other current assets & other non-current assets |  |  |  |  |
Liabilities | 2,498 |  |  |  | 2,498 |  |  | 2,498 |  |  |
Included in accrued liabilities & other non-current liabilities |  |  |  |  |
Contingent consideration related to acquisition: |  |  |  |  |  |  |  |
Liabilities | 95 |  |  |  | 95 |  |  |  |  | 95 |
Included in accrued liabilities |  |  |  |  |
(1) | Other long-term investments as of September 25, 2015 include a marketable equity security of $0.7 million, and other investments that are not carried at fair value including an equity method investment of $0.5 million and two cost method investments of $2.0 million and $0.5 million.
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | The following table presents the gross unrealized losses and fair value for those available-for-sale securities that were in an unrealized loss position as of April 1, 2016 and September 25, 2015 (in thousands):
| April 1, 2016 |  | September 25, 2015
Investment Type | Fair Value | Gross Unrealized Losses (1) |  | Fair Value | Gross Unrealized Losses (1)
Certificate of deposit | $ | 12,986 |  | $ | (15 | ) |  | $ | — |  | $ | — |
U.S. agency securities | 2,996 |  | (2 | ) |  | 19,005 |  | (17 | )
Commercial paper | 13,860 |  | (7 | ) |  | — |  | — |
Corporate bonds | 71,460 |  | (248 | ) |  | 148,034 |  | (403 | )
Municipal debt securities | 18,338 |  | (36 | ) |  | 35,476 |  | (60 | )
Total | $ | 119,640 |  | $ | (308 | ) |  | $ | 202,515 |  | $ | (480 | )
(1) | Our available-for-sale securities in an unrealized loss position were in such position for less than twelve months as of both April 1, 2016 and September 25, 2015.
Available-for-sale Securities | The following table summarizes the amortized cost and estimated fair value of the available-for-sale securities within our investment portfolio based on stated maturities as of April 1, 2016 and September 25, 2015, which are recorded within cash equivalents and both short and long-term investments in our consolidated balance sheets (in thousands):
| April 1, 2016 |  | September 25, 2015
Range of maturity | Amortized Cost | Fair Value |  | Amortized Cost | Fair Value
Due within 1 year | $ | 130,547 |  | $ | 130,505 |  |  | $ | 158,957 |  | $ | 159,090 |
Due in 1 to 2 years | 125,706 |  | 125,932 |  |  | 173,571 |  | 173,577 |
Due in 2 to 3 years | 138,027 |  | 138,604 |  |  | 143,879 |  | 143,752 |
Total | $ | 394,280 |  | $ | 395,041 |  |  | $ | 476,407 |  | $ | 476,419 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 5: 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 6: 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 7: 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 + Details
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