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Fair Value and Derivative Instruments (Tables) | 9 Months Ended
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Sep. 25, 2021
Fair Value Disclosures [Abstract] |
Schedule of Fair Value Assets Measured on Recurring Basis | Assets and liabilities measured at fair value on a recurring basis were as follows (in thousands):
September 25, 2021 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market funds |  | $ | 12,621 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,621 |
U.S. treasuries |  | 5,300 |  |  | — |  |  | — |  |  | 5,300 |
|  | 17,921 |  |  | — |  |  | — |  |  | 17,921 |
Marketable securities: |  |  |  |  |  |  |  |
U.S. treasuries |  | 37,135 |  |  | — |  |  | — |  |  | 37,135 |
Certificates of deposit |  | — |  |  | 723 |  |  | — |  |  | 723 |
U.S. agency securities |  | — |  |  | 575 |  |  | — |  |  | 575 |
Corporate bonds |  | — |  |  | 27,336 |  |  | — |  |  | 27,336 |
Commercial paper |  | — |  |  | 45,129 |  |  | — |  |  | 45,129 |
|  | 37,135 |  |  | 73,763 |  |  | — |  |  | 110,898 |
Interest rate swap derivative contracts |  | — |  |  | 548 |  |  | — |  |  | 548 |
Total assets |  | $ | 55,056 |  |  | $ | 74,311 |  |  | $ | — |  |  | $ | 129,367 |
Liabilities: |  |  |  |  |  |  |  |
Foreign exchange derivative contracts (Designated) |  | $ | — |  |  | $ | (258) |  |  | $ | — |  |  | $ | (258) |
Interest rate swap derivative contracts |  | — |  |  | (100) |  |  | — |  |  | (100) |
Total liabilities |  | $ | — |  |  | $ | (358) |  |  | $ | — |  |  | $ | (358) |
December 26, 2020 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market funds |  | $ | 43,019 |  |  | $ | — |  |  | $ | — |  |  | $ | 43,019 |
Marketable securities: |  |  |  |  |  |  |  |
U.S. treasuries |  | 40,726 |  |  | — |  |  | — |  |  | 40,726 |
Certificates of deposit |  | — |  |  | 2,179 |  |  | — |  |  | 2,179 |
U.S. agency securities |  | — |  |  | 575 |  |  | — |  |  | 575 |
Corporate bonds |  | — |  |  | 24,330 |  |  | — |  |  | 24,330 |
|  | 40,726 |  |  | 27,084 |  |  | — |  |  | 67,810 |
Foreign exchange derivative contracts |  | — |  |  | 1,057 |  |  | — |  |  | 1,057 |
Interest rate swap derivative contracts |  | — |  |  | 57 |  |  | — |  |  | 57 |
Total assets |  | $ | 83,745 |  |  | $ | 28,198 |  |  | $ | — |  |  | $ | 111,943 |
Liabilities: |  |  |  |  |  |  |  |
Interest rate swap derivative contracts |  | $ | — |  |  | $ | (87) |  |  | $ | — |  |  | $ | (87) |
Contingent consideration |  | — |  |  | — |  |  | (4,012) |  |  | (4,012) |
Total liabilities |  | $ | — |  |  | $ | (87) |  |  | $ | (4,012) |  |  | $ | (4,099) |
Schedule of Foreign Currency Forward Contracts | The following table provides information about our foreign currency forward contracts outstanding as of September 25, 2021 (in thousands):
Currency |  | Contract Position |  | Contract Amount (Local Currency) |  | Contract Amount (U.S. Dollars)
Euro Dollar |  | Buy |  | (11,900) |  |  | $ | (14,245) |
Euro Dollar |  | Sell |  | 2,520 |  |  | 2,953 |
Japanese Yen |  | Sell |  | 1,992,865 |  |  | 17,994 |
Korean Won |  | Buy |  | (2,513,139) |  |  | (2,138) |
Taiwan Dollar |  | Sell |  | 7,440 |  |  | 269 |
Total USD notional amount of outstanding foreign exchange contracts |  |  |  |  |  | $ | 4,833 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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