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VENTURE CAPITAL INVESTMENTS AND MARKETABLE SECURITIES - Additional Information (Details) - USD ($) | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Marketable Securities and Equity-Method Affiliates [Abstract] |  |  |
Gains related to venture capital investments | $ 22,867,000 | $ 10,284,000 | $ 3,823,000
Total commitment | 88,200,000 |  |
Venture capital investments | 51,200,000 |  |
Dividends received | 10,100,000 | 7,100,000 | $ 7,300,000
Consolidated retained earnings (accumulated deficit) | 12,100,000 | 4,400,000 |
Marketable securities | $ 0 | 0 |
Sales of available for sale securities |  | $ 4,600,000 |

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