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FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details)
$ in Thousands
Mar. 25, 2018
USD ($)
Fair Value  
Unrealized Losses Less than 12 Months $ 268,046
Unrealized Losses 12 Months or Greater 22,178
Total 290,224
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (1,878)
Unrealized Losses 12 Months or Greater (198)
Total (2,076)
U.S. Treasury and agencies  
Fair Value  
Unrealized Losses Less than 12 Months 19,026
Unrealized Losses 12 Months or Greater 4,338
Total 23,364
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (144)
Unrealized Losses 12 Months or Greater (62)
Total (206)
Municipal notes and bonds  
Fair Value  
Unrealized Losses Less than 12 Months 149,564
Unrealized Losses 12 Months or Greater 0
Total 149,564
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (533)
Unrealized Losses 12 Months or Greater 0
Total (533)
Mutual funds  
Fair Value  
Unrealized Losses Less than 12 Months 9,117
Unrealized Losses 12 Months or Greater 0
Total 9,117
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (67)
Unrealized Losses 12 Months or Greater 0
Total (67)
Government-sponsored enterprises  
Fair Value  
Unrealized Losses Less than 12 Months 10,805
Unrealized Losses 12 Months or Greater 0
Total 10,805
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (180)
Unrealized Losses 12 Months or Greater 0
Total (180)
Corporate notes and bonds  
Fair Value  
Unrealized Losses Less than 12 Months 79,534
Unrealized Losses 12 Months or Greater 17,840
Total 97,374
Gross Unrealized Loss  
Unrealized Losses Less than 12 Months (954)
Unrealized Losses 12 Months or Greater (136)
Total $ (1,090)