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Fair value measurements (Tables) | 3 Months Ended
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Mar. 31, 2026
Fair Value Disclosures [Abstract] |
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis | As of March 31, 2026, financial instruments measured at fair value on a recurring basis are summarized below:
| Level 1 |  | Level 2 |  | Fair value measurements
| (in $ thousands)
Investments in securities: |  |  |  |  |
Debt securities: |  |  |  |  |
Municipal | — |  |  | 9,870 |  |  | 9,870 |
Corporate | — |  |  | 143,285 |  |  | 143,285 |
Foreign | — |  |  | 339,350 |  |  | 339,350 |
U.S. Treasury Bonds | — |  |  | 58,656 |  |  | 58,656 |
Equity securities | 51,324 |  |  | — |  |  | 51,324 |
| 51,324 |  |  | 551,161 |  |  | 602,485 |
As of December 31, 2025, financial instruments measured at fair value on a recurring basis are summarized below:
| Level 1 |  | Level 2 |  | Fair value measurements
| (in $ thousands)
Investments in securities: |  |  |  |  |
Debt securities: |  |  |  |  |
Municipal | — |  |  | 12,274 |  |  | 12,274 |
Corporate | — |  |  | 143,621 |  |  | 143,621 |
Foreign | — |  |  | 348,084 |  |  | 348,084 |
U.S. Treasury Bonds | — |  |  | 54,509 |  |  | 54,509 |
Equity securities | 47,682 |  |  | — |  |  | 47,682 |
| 47,682 |  |  | 558,488 |  |  | 606,170 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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