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FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands | Sep. 29, 2019 USD ($)
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Fair Value |
Unrealized Losses Less than 12 Months | $ 58,997
Unrealized Losses 12 Months or Greater | 38,831
Total | 97,828
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months | (228)
Unrealized Losses 12 Months or Greater | (157)
Total | (385)
U.S. Treasury and agencies |
Fair Value |
Unrealized losses less than 12 months, available for sale | 5,035
Unrealized losses 12 months or greater, available for sale | 997
Total, available for sale | 6,032
Gross Unrealized Loss |
Unrealized losses less than 12 months, available for sale | (17)
Unrealized losses 12 months or greater, available for sale | (3)
Total, available for sale | (20)
Mutual funds |
Fair Value |
Unrealized losses less than 12 months, trading | 2,974
Unrealized losses 12 months or greater, trading | 7,796
Total, trading | 10,770
Gross Unrealized Loss |
Unrealized losses less than 12 months, trading | (174)
Unrealized losses 12 months or greater, trading | (115)
Total, trading | (289)
Government-sponsored enterprises |
Fair Value |
Unrealized losses less than 12 months, available for sale | 0
Unrealized losses 12 months or greater, available for sale | 10,973
Total, available for sale | 10,973
Gross Unrealized Loss |
Unrealized losses less than 12 months, available for sale | 0
Unrealized losses 12 months or greater, available for sale | (23)
Total, available for sale | (23)
Foreign government bonds |
Fair Value |
Unrealized losses less than 12 months, available for sale | 6,199
Unrealized losses 12 months or greater, available for sale | 0
Total, available for sale | 6,199
Gross Unrealized Loss |
Unrealized losses less than 12 months, available for sale | (2)
Unrealized losses 12 months or greater, available for sale | 0
Total, available for sale | (2)
Corporate notes and bonds |
Fair Value |
Unrealized losses less than 12 months, available for sale | 40,347
Unrealized losses 12 months or greater, available for sale | 19,065
Total, available for sale | 59,412
Gross Unrealized Loss |
Unrealized losses less than 12 months, available for sale | (29)
Unrealized losses 12 months or greater, available for sale | (16)
Total, available for sale | (45)
Mortgage backed securities — commercial |
Fair Value |
Unrealized losses less than 12 months, available for sale | 4,442
Unrealized losses 12 months or greater, available for sale | 0
Total, available for sale | 4,442
Gross Unrealized Loss |
Unrealized losses less than 12 months, available for sale | (6)
Unrealized losses 12 months or greater, available for sale | 0
Total, available for sale | $ (6)

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