Investments - Carrying Value and Amortized Cost of Company's Investments Summarized by Major Security Type (Detail) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Debt securities, Amortized Cost | $ 572,952 | $ 640,499 |
| Debt securities, Unrealized Gains | 78 | 1,549 |
| Debt securities, Unrealized Losses | (1,541) | (57) |
| Debt securities, Estimated Fair Value | 571,489 | 641,991 |
| US Treasury Securities | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Debt securities, Amortized Cost | 382,114 | 429,260 |
| Debt securities, Unrealized Gains | 75 | 1,291 |
| Debt securities, Unrealized Losses | (695) | 0 |
| Debt securities, Estimated Fair Value | 381,494 | 430,551 |
| Government Sponsored Enterprises Debt Securities | ||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Debt securities, Amortized Cost | 190,838 | 211,239 |
| Debt securities, Unrealized Gains | 3 | 258 |
| Debt securities, Unrealized Losses | (846) | (57) |
| Debt securities, Estimated Fair Value | $ 189,995 | $ 211,440 |
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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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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