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Schedule of Available for Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 28, 2014 | Dec. 31, 2013
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Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | $ 965,843 | $ 855,786
Available-for-sale marketable securities, Unrealized Gain | 4,260 | 3,689
Available-for-sale marketable securities, Unrealized (Loss) | (494) | (1,515)
Available-for-sale marketable securities, Fair Market Value | 969,609 | 857,960
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 212,156 | 241,760
U.S. Government Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 285,528 | 202,573
Available-for-sale marketable securities, Unrealized Gain | 195 | 75
Available-for-sale marketable securities, Unrealized (Loss) | (106) | (60)
Available-for-sale marketable securities, Fair Market Value | 285,617 | 202,588
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 66,700 | 84,498
U.S. Treasury Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 458,958 | 468,084
Available-for-sale marketable securities, Unrealized Gain | 373 | 94
Available-for-sale marketable securities, Unrealized (Loss) | (91) | (283)
Available-for-sale marketable securities, Fair Market Value | 459,240 | 467,895
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 64,267 | 108,212
Commercial Paper |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 99,767 | 105,583
Available-for-sale marketable securities, Unrealized Gain | 11 | 16
Available-for-sale marketable securities, Unrealized (Loss) | (4) | (1)
Available-for-sale marketable securities, Fair Market Value | 99,774 | 105,598
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 23,722 | 7,993
Corporate Debt Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 92,883 | 65,747
Available-for-sale marketable securities, Unrealized Gain | 1,734 | 762
Available-for-sale marketable securities, Unrealized (Loss) | (260) | (1,122)
Available-for-sale marketable securities, Fair Market Value | 94,357 | 65,387
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 56,393 | 40,355
Equity And Debt Mutual Funds |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 10,199 | 10,463
Available-for-sale marketable securities, Unrealized Gain | 1,933 | 2,742
Available-for-sale marketable securities, Unrealized (Loss) | (33) | (49)
Available-for-sale marketable securities, Fair Market Value | 12,099 | 13,156
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 1,074 | 702
Certificates of Deposit and Time Deposits |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 18,508 | 3,258
Available-for-sale marketable securities, Unrealized Gain | 14 |
Available-for-sale marketable securities, Fair Market Value | 18,522 | 3,258
Non-U.S. Government Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost |  | 78
Available-for-sale marketable securities, Fair Market Value |  | $ 78

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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