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Income Taxes (Reconciliation Of The Difference Between The Provision For Income Taxes And The Expected Tax Provision At The Weighted Average Tax Rate) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | $ 223,775 | $ (253,811) | $ 336,163
Net investment income | 1,164,892 | 642,465 | 647,139
Net realized capital gains (losses) | 257,943 | 267,649 | 185,004
Corporate expenses | (67,827) | (41,118) | (32,966)
Interest, fee and bond issue cost amortization expense | (70,149) | (36,323) | (31,693)
Other income (expense) | 36,987 | 6,487 | (4,660)
INCOME (LOSS) BEFORE TAXES | 1,545,621 | 585,349 | 1,098,987
Total income tax provision | 166,538 | 71,198 | 89,526
Domestic [Member] |  |  |
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | (83,159) | 24,041 | 38,964
Net investment income | 707,971 | 339,721 | 325,179
Net realized capital gains (losses) | 266,036 | 234,970 | 155,609
Net derivative gain (loss) |  |  |
Corporate expenses | (33,334) | (15,985) | (13,063)
Interest, fee and bond issue cost amortization expense | (69,974) | (35,659) | (34,931)
Other income (expense) | 23,315 | (14,656) | (1,976)
INCOME (LOSS) BEFORE TAXES | 810,855 | 532,432 | 469,782
Expected tax provision at the applicable statutory rate(s) | 170,170 | 111,846 | 98,766
Increase (decrease) in taxes resulting from: Tax exempt income | (3,927) | (3,598) | (3,680)
Increase (decrease) in taxes resulting from: Dividend received deduction | (840) | (1,100) | (998)
Increase (decrease) in taxes resulting from: Proration | 1,048 | 1,049 | 1,050
Increase (decrease) in taxes resulting from: Affiliated preferred stock dividends | 6,517 | 6,517 | 6,517
Increase (decrease) in taxes resulting from: Creditable foreign premium tax | (13,392) | (11,513) | (9,852)
Increase (decrease) in taxes resulting from: Tax audit settlement |  |  | (1,576)
Increase (decrease) in taxes resulting from: Share based compensation tax benefits formerly in APIC | (1,950) | (2,605) | (2,984)
Increase (decrease) in taxes resulting from: Impact of CARES Act |  | (32,500) |
Increase (decrease) in tax resulting from: Change in uncertain tax positions | 324 | 277 | 138
Increase (decrease) in taxes resulting from: Valuation allowance |  |  | (8,434)
Increase (decrease) in taxes resulting from: Other | 3,523 | 2,393 | (3,744)
Total income tax provision | 161,473 | 70,766 | 75,203
Non-U.S. [Member] |  |  |
Income Taxes [Line Items] |  |  |
Underwriting gain (loss) | 306,933 | (277,852) | 297,199
Net investment income | 456,921 | 302,744 | 321,960
Net realized capital gains (losses) | (8,094) | 32,679 | 29,394
Net derivative gain (loss) | 2,965 | 1,541 | 6,374
Corporate expenses | (34,493) | (25,133) | (19,903)
Interest, fee and bond issue cost amortization expense | (175) | (664) | 3,239
Other income (expense) | 10,709 | 19,602 | (9,057)
INCOME (LOSS) BEFORE TAXES | 734,766 | 52,917 | 629,206
Expected tax provision at the applicable statutory rate(s) | 14,358 | (10,356) | 17,205
Increase (decrease) in taxes resulting from: Tax exempt income |  |  |
Increase (decrease) in taxes resulting from: Dividend received deduction |  |  |
Increase (decrease) in taxes resulting from: Proration |  |  |
Increase (decrease) in taxes resulting from: Affiliated preferred stock dividends |  |  |
Increase (decrease) in taxes resulting from: Creditable foreign premium tax |  |  |
Increase (decrease) in taxes resulting from: Tax audit settlement |  |  |
Increase (decrease) in taxes resulting from: Share based compensation tax benefits formerly in APIC | (232) | (388) | (373)
Increase (decrease) in taxes resulting from: Impact of CARES Act |  |  |
Increase (decrease) in tax resulting from: Change in uncertain tax positions | (9,796) | 15,144 | 3,772
Increase (decrease) in taxes resulting from: Valuation allowance |  |  |
Increase (decrease) in taxes resulting from: Other | 735 | (3,968) | (6,281)
Total income tax provision | $ 5,065 | $ 432 | $ 14,323

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