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Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Detail) $ in Thousands | Sep. 27, 2015 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | $ 1,028,172
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (4,594)
Unrealized Losses 12 Months or Greater - Fair Value | 47,485
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (324)
Total - Fair Value | 1,075,657
Total - Gross Unrealized Loss | (4,918)
Municipal Notes And Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 36,289
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (71)
Total - Fair Value | 36,289
Total - Gross Unrealized Loss | (71)
Corporate Notes And Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 759,706
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (3,240)
Unrealized Losses 12 Months or Greater - Fair Value | 25,380
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (80)
Total - Fair Value | 785,086
Total - Gross Unrealized Loss | (3,320)
U.S Treasury and Agencies |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 87,628
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (110)
Total - Fair Value | 87,628
Total - Gross Unrealized Loss | (110)
Mutual Funds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 18,043
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (525)
Total - Fair Value | 18,043
Total - Gross Unrealized Loss | (525)
Government-Sponsored Enterprises |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 6,805
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (20)
Total - Fair Value | 6,805
Total - Gross Unrealized Loss | (20)
Foreign Government Bonds |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 21,102
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (65)
Total - Fair Value | 21,102
Total - Gross Unrealized Loss | (65)
Mortgage Backed Securities - Residential |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 18,279
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (165)
Unrealized Losses 12 Months or Greater - Fair Value | 1,943
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (90)
Total - Fair Value | 20,222
Total - Gross Unrealized Loss | (255)
Mortgage Backed Securities - Commercial |
Schedule of Available-for-sale Securities [Line Items] |
Unrealized Losses Less Than 12 Months - Fair Value | 80,320
Unrealized Losses Less Than 12 Months - Gross Unrealized Loss | (398)
Unrealized Losses 12 Months or Greater - Fair Value | 20,162
Unrealized Losses 12 Months or Greater - Gross Unrealized Loss | (154)
Total - Fair Value | 100,482
Total - Gross Unrealized Loss | $ (552)

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