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VENTURE CAPITAL AND OTHER INVESTMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Schedule of Equity Method Investments [Line Items]
Venture capital investments	$ 99,748		$ 99,748		$ 87,545
Committed contribution	128,600		128,600
Amount funded for venture capital investments	75,400		75,400
Dividends received	900	$ 1,500	1,600	$ 8,500
Gains (losses) recognized from venture capital investments	(4,300)	$ 10,900	6,300	$ 17,400
Other equity investments	$ 12,492		$ 12,492		$ 1,046
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	1.00%		1.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	12.00%		12.00%

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