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Schedule of Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands | Jul. 03, 2016 | Dec. 31, 2015
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Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | $ 718,909 | $ 745,498
Available-for-sale marketable securities, Unrealized Gain | 6,286 | 2,145
Available-for-sale marketable securities, Unrealized (Loss) | (496) | (4,019)
Available-for-sale marketable securities, Fair Market Value | 724,699 | 743,624
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 162,997 | 601,660
U.S. Treasury Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 473,958 | 421,060
Available-for-sale marketable securities, Unrealized Gain | 1,684 | 65
Available-for-sale marketable securities, Unrealized (Loss) | (11) | (1,167)
Available-for-sale marketable securities, Fair Market Value | 475,631 | 419,958
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 118,777 | 379,434
Corporate Debt Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 140,995 | 163,297
Available-for-sale marketable securities, Unrealized Gain | 3,060 | 902
Available-for-sale marketable securities, Unrealized (Loss) | (457) | (2,565)
Available-for-sale marketable securities, Fair Market Value | 143,598 | 161,634
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 40,862 | 145,373
U.S. Government Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 27,151 | 84,032
Available-for-sale marketable securities, Unrealized Gain | 67 | 42
Available-for-sale marketable securities, Unrealized (Loss) |  | (122)
Available-for-sale marketable securities, Fair Market Value | 27,218 | 83,952
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 2,421 | 55,120
Certificates of Deposit and Time Deposits |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 27,958 | 43,391
Available-for-sale marketable securities, Unrealized Gain | 16 | 6
Available-for-sale marketable securities, Unrealized (Loss) |  | (3)
Available-for-sale marketable securities, Fair Market Value | 27,974 | 43,394
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  | 10,527
Commercial Paper |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 32,959 | 20,298
Available-for-sale marketable securities, Unrealized Gain | 19 | 11
Available-for-sale marketable securities, Unrealized (Loss) |  | (1)
Available-for-sale marketable securities, Fair Market Value | 32,978 | 20,308
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  | 8,646
Equity And Debt Mutual Funds |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 15,278 | 12,996
Available-for-sale marketable securities, Unrealized Gain | 1,424 | 1,119
Available-for-sale marketable securities, Unrealized (Loss) | (28) | (161)
Available-for-sale marketable securities, Fair Market Value | 16,674 | 13,954
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 937 | 2,560
Non-U.S. Government Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 610 | 424
Available-for-sale marketable securities, Unrealized Gain | 16 |
Available-for-sale marketable securities, Fair Market Value | $ 626 | $ 424

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