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INVESTMENTS IN SECURITIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 24, 2017 | Sep. 30, 2018 | Sep. 24, 2017 | Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Gross realized gains | $ 2,500 | $ 2,000 | $ 5,400 | $ 3,100 |
Fixed income securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Amortized Cost | 253,500 |  | 253,500 |  | $ 330,456
Fair Value | 253,500 |  | 253,500 |  | 330,456
Other |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Amortized Cost | 32,273 |  | 32,273 |  | 942
Fair Value | $ 32,273 |  | $ 32,273 |  | $ 942

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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