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Fair Value of Financial Instruments - Marketable securities portfolio (Details) - Debt securities (government) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Summary of marketable security portfolio |  |
Amortized Cost | $ 442,816 | $ 292,580
Net Unrealized Losses | (149) | (5,037)
Estimated Fair Value | $ 442,667 | $ 287,543
Minimum |  |
Summary of marketable security portfolio |  |
Contractual maturity dates | 12 months |
Maximum |  |
Summary of marketable security portfolio |  |
Contractual maturity dates | 18 months |

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- Definition Amount, before tax, of unrealized gain (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://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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