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INCOME TAXES - Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Deferred tax assets:
Compensation	$ 32,118	$ 40,582
Accruals and reserves	17,970	13,687
Net operating loss and credit carryforwards	406,085	367,269
Operating lease liability	43,646	33,785
Other	4,253	7,181
Valuation allowance	(334,845)	(309,962)	$ (9,800)
Total deferred tax assets	169,227	152,542
Deferred tax liabilities:
Goodwill and other intangibles	(202,430)	(174,847)
Depreciation related	(33,277)	(29,317)
Venture capital investments	(32,848)	(12,806)
Tax on unremitted earnings	(27,707)	(17,282)
Right-of-use assets	(43,557)	(34,953)
Other	(8,710)	(5,961)
Total deferred tax liabilities	(348,529)	(275,166)
Net deferred taxes	$ (179,302)	$ (122,624)

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