FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands	Dec. 26, 2021 USD ($)
Fair Value
Unrealized Losses Less than 12 Months, available for sale	$ 191,297
Unrealized Losses 12 Months or Greater	1,998
Total, Fair Value	193,295
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(182)
Unrealized Losses 12 Months or Greater	(71)
Total, Gross Unrealized Loss	(253)
Mutual funds
Fair Value
Unrealized Losses Less than 12 Months, trading	7,408
Unrealized Losses 12 Months or Greater, trading	1,998
Trading Securities, Continuous Unrealized Loss Position, fair value	9,406
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, trading	(55)
Unrealized Losses 12 Months or Greater, trading	(71)
Trading Securities, Continuous Unrealized Loss Position, Accumulated Loss	(126)
Corporate notes and bonds
Fair Value
Unrealized Losses Less than 12 Months, available for sale	180,892
Unrealized Losses 12 Months or Greater	0
Total, Fair Value	180,892
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(126)
Unrealized Losses 12 Months or Greater	0
Total, Gross Unrealized Loss	(126)
Mortgage backed securities — commercial
Fair Value
Unrealized Losses Less than 12 Months, available for sale	2,997
Unrealized Losses 12 Months or Greater	0
Total, Fair Value	2,997
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(1)
Unrealized Losses 12 Months or Greater	0
Total, Gross Unrealized Loss	$ (1)