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INVESTMENTS IN SECURITIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2020 | Jun. 30, 2019 | Jun. 28, 2020 | Jun. 30, 2019 | Dec. 29, 2019
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Gross realized gains | $ 1,000 | $ 2,900 | $ 2,400 | $ 5,100 |
Fixed income securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 31,019 |  | 31,019 |  | $ 159,623
Fair Value | 31,019 |  | 31,019 |  | 159,623
Other |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 35,301 |  | 35,301 |  | 0
Fair Value | $ 35,301 |  | $ 35,301 |  | $ 0

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