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SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Condensed Balance Sheets (Details) - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Assets |  |  |
Fixed income, available-for-sale | $ 5,851,689 | $ 5,723,113 |
Investments | 5,867,560 | 5,738,734 |
Cash and cash equivalents | 229,485 | 363,666 |
Accrued investment income | 61,064 | 58,774 |
Total assets | 6,547,235 | 6,538,380 |
Liabilities: |  |  |
Senior notes | 644,667 | 643,196 |
Other liabilities | 147,171 | 160,009 |
Total liabilities | 1,374,860 | 1,466,363 |
Shareholders’ equity: |  |  |
Common stock | 248,449 | 371,353 |
Paid-in capital | 1,808,236 | 1,808,113 |
Treasury stock, at cost | 0 | (1,384,293) |
Accumulated other comprehensive income (loss), net of tax | (288,162) | (316,281) |
Retained earnings | 3,403,852 | 4,593,125 |
Total shareholders' equity | 5,172,375 | 5,072,017 | $ 4,642,740
Total liabilities and shareholders' equity | $ 6,547,235 | $ 6,538,380 |
Parenthetical information [Abstract] |  |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1 |
Common stock, shares authorized (in shares) | 1,000,000,000 | 1,000,000,000 |
Common stock, shares issued (in shares) | 248,449,000 | 371,353,000 |
Common stock, shares outstanding (in shares) | 248,449,000 | 272,494,000 |
Treasury stock, shares at cost (in shares) | 0 | 98,859,000 |
Fixed income |  |  |
Assets |  |  |
Fixed income, available-for-sale | $ 5,511,564 | $ 5,601,540 |
Parenthetical information [Abstract] |  |  |
Fixed income, amortized cost | 5,838,145 | 5,939,483 |
Short-Term Investments |  |  |
Assets |  |  |
Fixed income, available-for-sale | 340,125 | 121,573 |
Parenthetical information [Abstract] |  |  |
Fixed income, amortized cost | 339,978 | 121,539 |
Parent Company |  |  |
Assets |  |  |
Investments | 925,880 | 709,333 |
Cash and cash equivalents | 149,944 | 208,600 |
Investment in subsidiaries, at equity in net assets | 4,767,074 | 4,777,121 |
Accounts receivable - affiliates | 2,512 | 2,860 |
Income taxes - current and deferred | 2,221 | 34,597 |
Accrued investment income | 8,165 | 5,975 |
Total assets | 5,855,796 | 5,738,486 |
Liabilities: |  |  |
Senior notes | 644,667 | 643,196 |
Accrued interest | 12,797 | 12,797 |
Other liabilities | 25,957 | 10,476 |
Total liabilities | 683,421 | 666,469 |
Shareholders’ equity: |  |  |
Common stock | 248,449 | 371,353 |
Paid-in capital | 1,808,236 | 1,808,113 |
Treasury stock, at cost | 0 | (1,384,293) |
Accumulated other comprehensive income (loss), net of tax | (288,162) | (316,281) |
Retained earnings | 3,403,852 | 4,593,125 |
Total shareholders' equity | 5,172,375 | 5,072,017 |
Total liabilities and shareholders' equity | $ 5,855,796 | $ 5,738,486 |
Parenthetical information [Abstract] |  |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1 |
Common stock, shares authorized (in shares) | 1,000,000,000 | 1,000,000,000 |
Common stock, shares issued (in shares) | 248,449,000 | 371,353,000 |
Common stock, shares outstanding (in shares) | 248,449,000 | 272,494,000 |
Treasury stock, shares at cost (in shares) | 0 | 98,859,000 |
Parent Company | Fixed income |  |  |
Assets |  |  |
Fixed income, available-for-sale | $ 546,179 | $ 598,420 |
Parenthetical information [Abstract] |  |  |
Fixed income, amortized cost | 544,456 | 597,944 |
Parent Company | Short-Term Investments |  |  |
Assets |  |  |
Fixed income, available-for-sale | 379,701 | 110,913 |
Parenthetical information [Abstract] |  |  |
Fixed income, amortized cost | $ 379,603 | $ 110,889 |

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