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INVESTMENTS IN SECURITIES (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 26, 2017 | Mar. 27, 2016 | Dec. 25, 2016
Schedule of Available-for-sale Securities [Line Items] |  |  |
Proceeds from sale or maturity of available-for-sale securities | $ 0 | $ 0 |
Fixed income securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 0 |  | $ 44,865,000
Fair Value | 0 |  | 44,865,000
Other |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 62,000 |  | 61,000
Fair Value | $ 62,000 |  | $ 61,000

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