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Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Carrying Amounts And Estimated Fair Values Of Financial Instruments | The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments:
| September 30, 2023 |  | December 31, 2022
(In thousands) | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
Assets: |  |  |  |  |  |  |
Fixed maturity securities | $ | 19,035,305 |  |  | $ | 19,037,149 |  |  | $ | 17,587,349 |  |  | $ | 17,591,626 |
Equity securities | 1,182,061 |  |  | 1,182,061 |  |  | 1,185,894 |  |  | 1,185,894 |
Arbitrage trading account | 825,049 |  |  | 825,049 |  |  | 944,230 |  |  | 944,230 |
Loans receivable | 177,750 |  |  | 174,300 |  |  | 193,002 |  |  | 187,981 |
Cash and cash equivalents | 1,646,074 |  |  | 1,646,074 |  |  | 1,449,346 |  |  | 1,449,346 |
Trading account receivables from brokers and clearing organizations | 401,982 |  |  | 401,982 |  |  | 233,863 |  |  | 233,863 |
Due from broker | — |  |  | — |  |  | 3,609 |  |  | 3,609 |
Liabilities: |  |  |  |  |  |  |
Due to broker | 5,118 |  |  | 5,118 |  |  | — |  |  | — |
Trading account securities sold but not yet purchased | 7,538 |  |  | 7,538 |  |  | — |  |  | — |
Senior notes and other debt | 1,828,046 |  |  | 1,321,014 |  |  | 1,828,823 |  |  | 1,439,188 |
Subordinated debentures | 1,008,910 |  |  | 786,798 |  |  | 1,008,371 |  |  | 805,600 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-11 + Details
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