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Fair Value Measurement - Summary of Marketable Securities (Detail) $ in Thousands | Dec. 31, 2021 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | $ 399,170
Unrealized Gains | 295
Unrealized Losses | (2,007)
Fair Value | 397,458
Total |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 399,149
Unrealized Gains | 295
Unrealized Losses | (2,007)
Fair Value | 397,437
Corporate bonds |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 274,939
Unrealized Gains | 100
Unrealized Losses | (1,725)
Fair Value | 273,314
Asset-backed securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 96,713
Unrealized Gains | 190
Unrealized Losses | (199)
Fair Value | 96,704
U.S. government and agency securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 20,235
Unrealized Gains | 0
Unrealized Losses | (64)
Fair Value | 20,171
Foreign government and agency securities |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 3,262
Unrealized Gains | 0
Unrealized Losses | (19)
Fair Value | 3,243
Municipal/provincial bonds and other |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 4,000
Unrealized Gains | 5
Unrealized Losses | 0
Fair Value | 4,005
Pending Purchases And Sales |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Amortized Cost | 21
Unrealized Gains | 0
Unrealized Losses | 0
Fair Value | $ 21

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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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