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Investments - Schedule of Contractual Maturities of Held to Maturity Investments (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Held To Maturity Securities Debt Maturities [Abstract] |  |  |
Amortized cost basis, due in one year or less | [1] | $ 152,862 | $ 103,733
Amortized cost basis due after one year through five years |  | 1,961 | 56,619
Amortized cost basis, total |  | 154,823 | 160,352
Aggregate fair value, due in one year or less | [1] | 156,976 | 103,669
Aggregate fair value, due after one year through five years |  | 1,948 | 56,433
Aggregate fair value, total |  | $ 158,924 | $ 160,102
[1] | The investments due in one year or less include cash equivalents of $51.8 million as of December 31, 2022 and $23.8 million as of December 31, 2021.

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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980459&loc=SL120269850-112803 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980459&loc=d3e62586-112803 + Details
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