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Schedule II - Condensed Financial Information Of The Registrant (Condensed Balance Sheets) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items] |  |  |
Fixed maturities - available for sale, at market value | $ 22,308,272 | $ 20,040,173 |
Other invested assets | 2,919,965 | 2,012,581 |
Cash | 1,440,861 | 801,651 |
Accrued investment income | 149,105 | 141,304 |
Other assets | 757,167 | 665,515 |
TOTAL ASSETS | 38,185,283 | 32,711,503 |
Other liabilities | 539,896 | 558,432 |
Total liabilities | 28,046,103 | 22,985,327 |
Preferred shares, par value: $0.01; 50,000 shares authorized; no shares issued and outstanding |  |  |
Common shares, par value | 698 | 696 |
Additional paid-in capital | 2,274,431 | 2,245,301 |
Accumulated other comprehensive income (loss), net of deferred income | 11,523 | 534,899 |
Treasury shares, at cost; | (3,847,308) | (3,622,172) |
Retained earnings | 11,699,836 | 10,567,452 |
Total shareholders' equity | 10,139,180 | 9,726,176 | $ 9,132,925
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY | 38,185,283 | 32,711,503 |
Fixed maturities - available for sale, at market value, amortized cost | $ 22,063,592 | $ 19,225,067 |
Preferred shares, par value | $ 0.01 | $ 0.01 |
Preferred shares, authorized | 50,000,000 | 50,000,000 |
Preferred shares, issued | 0 | 0 |
Preferred shares, outstanding | 0 | 0 |
Common shares, par value | $ 0.01 | $ 0.01 |
Common Stock, Shares Authorized | 200,000,000 | 200,000,000 |
Common shares, outstanding | 69,790,000 | 69,620,000 |
Accumulated other comprehensive income (loss), net deferred income tax expense (benefit) | $ 26,781 | $ 80,451 |
Treasury shares, at cost | 30,524,000 | 29,636,000 |
Parent Company [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Fixed maturities - available for sale, at market value |  | $ 3 |
Other invested assets | 211,612 | 282,762 |
Cash | 3,253 | 884 |
Investment in subsidiaries, at equity in the underlying net assets | 10,353,351 | 9,660,713 |
Accrued investment income |  |  |
Receivable from subsidiaries | 9,936 | 18,424 |
Other assets | 50,061 | 64,692 |
TOTAL ASSETS | 10,628,213 | 10,027,478 |
Long term notes payable, affiliated | 500,000 | 300,000 |
Due to subsidiaries | 1,622 | 1,933 |
Other liabilities | (12,589) | (631) |
Total liabilities | 489,033 | 301,302 |
Preferred shares, par value: $0.01; 50,000 shares authorized; no shares issued and outstanding |  |  |
Common shares, par value | 698 | 696 |
Additional paid-in capital | 2,274,431 | 2,245,301 |
Accumulated other comprehensive income (loss), net of deferred income | 11,523 | 534,899 |
Treasury shares, at cost; | (3,847,308) | (3,622,172) |
Retained earnings | 11,699,836 | 10,567,452 |
Total shareholders' equity | 10,139,180 | 9,726,176 |
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY | 10,628,213 | 10,027,478 |
Fixed maturities - available for sale, at market value, amortized cost |  | 3 |
Other invested assets, at cost | $ 211,612 | $ 282,762 |
Preferred shares, par value | $ 0.01 | $ 0.01 |
Preferred shares, authorized | 50,000,000 | 50,000,000 |
Preferred shares, issued | 0 | 0 |
Preferred shares, outstanding | 0 | 0 |
Common shares, par value | $ 0.01 | $ 0.01 |
Common Stock, Shares Authorized | 200,000,000 | 200,000,000 |
Common shares, issued | 69,790,000 | 69,620,000 |
Common shares, outstanding | 69,790,000 | 69,620,000 |
Treasury shares, at cost | 30,524,000 | 29,636,000 |
Parent Company [Member] | Notes Payable Other Payables [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Date due | Dec. 01, 2028 |  |

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