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Schedule of Reported Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | $ 334,077 | $ 601,976
Available-for-sale marketable securities, Unrealized Gain | 5,477 | 9,077
Available-for-sale marketable securities, Unrealized (Loss) | (718) | (213)
Available-for-sale marketable securities, Fair Market Value | 338,836 | 610,840
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 91,937 | 70,418
Marketable securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 244,213 | 522,228
Available-for-sale marketable securities, Unrealized Gain | 64 | 92
Available-for-sale marketable securities, Unrealized (Loss) | (46) | (40)
Available-for-sale marketable securities, Fair Market Value | 244,231 | 522,280
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | 54,798 | 61,806
Long-term marketable securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 89,864 | 79,748
Available-for-sale marketable securities, Unrealized Gain | 5,413 | 8,985
Available-for-sale marketable securities, Unrealized (Loss) | (672) | (173)
Available-for-sale marketable securities, Fair Market Value | 94,605 | 88,560
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses | $ 37,139 | $ 8,612

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (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=123581744&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (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 (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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