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v3.25.1

Investments - Change in Net Unrealized Gains (Losses) on Available-for-Sale Securities (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Roll Forward] |  |
Beginning balance | $ 4,996,096 | $ 4,632,347
Change in net unrealized investment gains (losses) | 58,894 | (7,079)
Ending balance | 5,119,407 | 4,713,764
Reclassification adjustments to net investment (gains) losses, tax | (657) | (1,401)
Amounts reclassified from accumulated other comprehensive income (loss) |  |
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Roll Forward] |  |
Beginning balance | (207,624) | (230,556)
Unrealized gains (losses) on investment securities | 71,848 | (15,665)
Provision for income taxes | (15,425) | 3,314
Change in unrealized gains (losses) on investment securities | 56,423 | (12,351)
Reclassification adjustments to net investment (gains) losses, net of taxes of $(657) and $(1,401), respectively | 2,471 | 5,272
Change in net unrealized investment gains (losses) | 58,894 | (7,079)
Ending balance | $ (148,730) | $ (237,635)

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- Definition Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and 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 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 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 10A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: 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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