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Investments - Net Gains (Losses) on Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Gain (Loss) on Securities [Line Items] |  |  |  |
Net realized gains (losses) on investments sold or redeemed | $ (2,874) | $ (4,139) | $ (11,730) | $ (8,454)
Mortgage loans held for sale | (99) | 0 | (94) | 0
Change in unrealized gains (losses) on investments sold or redeemed | 9 | 29 | 226 | (2,914)
Net unrealized gains (losses) on investments still held | (7,018) | (14,803) | (1,385) | (60,631)
Mortgage loans held for sale | (1,675) | 0 | (1,785) | 0
Total net gains (losses) on investments | (9,883) | (18,913) | (12,889) | (71,999)
Net gains (losses) on other financial instruments | 1,328 | 2,661 | 9,683 | (15,579)
Net gains (losses) on investments and other financial instruments | (8,555) | (16,252) | (3,206) | (87,578)
Fixed-maturities available for sale |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Gross realized gains | 20 | 411 | 588 | 2,554
Gross realized losses | (2,814) | (4,564) | (13,768) | (12,625)
Fixed-maturities available for sale, net | (2,794) | (4,153) | (13,180) | (10,071)
Trading securities |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Net realized gains (losses) on investments sold or redeemed | 0 | (30) | (402) | (136)
Net unrealized gains (losses) on investments still held | (5,632) | (7,398) | (4,494) | (27,892)
Equity securities |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Net realized gains (losses) on investments sold or redeemed | 0 | 0 | 1,890 | 1,655
Net unrealized gains (losses) on investments still held | 290 | (7,256) | 4,991 | (32,249)
Other investments |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Net realized gains (losses) on investments sold or redeemed | 19 | 44 | 56 | 98
Net unrealized gains (losses) on investments still held | $ (1) | $ (149) | $ (97) | $ (490)

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- Definition Gain (Loss) On Investments And Financial Instruments + References No definition available. + Details
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- Definition Amount of realized gain 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/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized gain (loss) 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 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized loss 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/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized and unrealized gain (loss) on investment. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c),9(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479616/944-310-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479616/944-310-45-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479584/944-310-50-1 + Details
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- Definition The increase (decrease) during the reporting period in the value of mortgage loans that are held with the intention to sell or be securitized in the near future. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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