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Fair Value Measurement - Company's available-for-sale (AFS) securities and other comprehensive income (OCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
OCI from AFS securities - debt securities: |  |  |  |
Beginning balance | $ 177,907 | $ 230,168 | $ 181,651 | $ 230,076
Reversal of losses from unrealized to realized | 0 | 0 | 0 | (65)
Unrealized holding losses on AFS securities | 0 | 0 | 0 | (251)
Change in OCI from AFS debt securities | 0 | 0 | 0 | (316)
Ending balance | 175,618 | 220,607 | 175,618 | 220,607
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent |  |  |  |
OCI from AFS securities - debt securities: |  |  |  |
Beginning balance | 0 | 0 | 0 | 316
Ending balance | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 + Details
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