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Fair Value of Financial Instruments (Carrying Amounts and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Equity securities | $ 1,090,347 | $ 1,185,894
Arbitrage trading account | 938,000 | 944,000
Loans receivable | 198,244 | 187,981
Carrying Value |  |
Assets: |  |
Fixed maturity securities | 20,178,308 | 17,587,349
Equity securities | 1,090,347 | 1,185,894
Arbitrage trading account | 938,049 | 944,230
Loans receivable | 201,271 | 193,002
Cash and cash equivalents | 1,363,195 | 1,449,346
Trading accounts receivable from brokers and clearing organizations | 303,614 | 233,863
Due from broker | 36,747 | 3,609
Liabilities: |  |
Trading account securities sold but not yet purchased | 9,357 | 0
Carrying Value | Total senior notes and other debt |  |
Liabilities: |  |
Long-term debt fair value | 1,827,951 | 1,828,823
Carrying Value | Total subordinated debentures |  |
Liabilities: |  |
Long-term debt fair value | 1,009,090 | 1,008,371
Fair Value |  |
Assets: |  |
Fixed maturity securities | 20,181,547 | 17,591,626
Equity securities | 1,090,347 | 1,185,894
Arbitrage trading account | 938,049 | 944,230
Loans receivable | 198,244 | 187,981
Cash and cash equivalents | 1,363,195 | 1,449,346
Trading accounts receivable from brokers and clearing organizations | 303,614 | 233,863
Due from broker | 36,747 | 3,609
Liabilities: |  |
Trading account securities sold but not yet purchased | 9,357 | 0
Fair Value | Total senior notes and other debt |  |
Liabilities: |  |
Long-term debt fair value | 1,480,076 | 1,439,188
Fair Value | Total subordinated debentures |  |
Liabilities: |  |
Long-term debt fair value | $ 929,598 | $ 805,600

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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