Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 29, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 414,857	$ 259,011
Available-for-sale marketable securities, Unrealized Gain	5,343	592
Available-for-sale marketable securities, Unrealized (Loss)	(105)	(2,967)
Available-for-sale marketable securities, Fair Market Value	420,095	256,636
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	60,747	191,978
Marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	342,234	190,100
Available-for-sale marketable securities, Unrealized Gain	313	88
Available-for-sale marketable securities, Unrealized (Loss)	(9)	(92)
Available-for-sale marketable securities, Fair Market Value	342,538	190,096
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	46,115	140,262
Long-term marketable securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	72,623	68,911
Available-for-sale marketable securities, Unrealized Gain	5,030	504
Available-for-sale marketable securities, Unrealized (Loss)	(96)	(2,875)
Available-for-sale marketable securities, Fair Market Value	77,557	66,540
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 14,632	$ 51,716

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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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

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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

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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