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Segment Reporting (Tables) | 6 Months Ended
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Jun. 30, 2021
Segment Reporting [Abstract] |
Schedule Of Underwriting Results For Operating Segments |
| Three Months Ended |  | Six Months Ended
Reinsurance | June 30, |  | June 30,
(Dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Gross written premiums | $ | 2,148,235 |  | $ | 1,538,348 |  | $ | 4,207,250 |  | $ | 3,316,119
Net written premiums |  | 2,059,919 |  |  | 1,424,089 |  |  | 3,972,868 |  |  | 3,037,183
Premiums earned | $ | 1,920,801 |  | $ | 1,502,256 |  | $ | 3,698,253 |  | $ | 2,987,476
Incurred losses and LAE |  | 1,168,139 |  |  | 1,005,677 |  |  | 2,440,045 |  |  | 2,026,319
Commission and brokerage |  | 473,258 |  |  | 387,339 |  |  | 881,982 |  |  | 757,695
Other underwriting expenses |  | 47,065 |  |  | 39,698 |  |  | 99,061 |  |  | 83,837
Underwriting gain (loss) | $ | 232,339 |  | $ | 69,542 |  | $ | 277,165 |  | $ | 119,625
| Three Months Ended |  | Six Months Ended
Insurance | June 30, |  | June 30,
(Dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Gross written premiums | $ | 1,041,905 |  | $ | 830,990 |  | $ | 1,914,323 |  | $ | 1,624,090
Net written premiums |  | 749,492 |  |  | 593,389 |  |  | 1,390,479 |  |  | 1,181,774
Premiums earned | $ | 637,571 |  | $ | 540,149 |  | $ | 1,247,984 |  | $ | 1,091,743
Incurred losses and LAE |  | 418,002 |  |  | 401,339 |  |  | 857,515 |  |  | 811,537
Commission and brokerage |  | 84,490 |  |  | 78,977 |  |  | 164,777 |  |  | 157,143
Other underwriting expenses |  | 93,779 |  |  | 78,432 |  |  | 184,014 |  |  | 163,153
Underwriting gain (loss) | $ | 41,300 |  | $ | (18,599) |  | $ | 41,678 |  | $ | (40,090)
Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes |
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
(Dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Underwriting gain (loss) | $ | 273,639 |  | $ | 50,943 |  | $ | 318,843 |  | $ | 79,535
Net investment income |  | 407,095 |  |  | 38,083 |  |  | 667,508 |  |  | 185,883
Net realized capital gains (losses) |  | 104,109 |  |  | 184,648 |  |  | 143,011 |  |  | (25,940)
Corporate expenses |  | (16,168) |  |  | (8,733) |  |  | (28,546) |  |  | (18,566)
Interest, fee and bond issue cost amortization expense |  | (15,607) |  |  | (7,253) |  |  | (31,246) |  |  | (14,836)
Other income (expense) |  | 7,114 |  |  | (20,621) |  |  | 63,707 |  |  | (12,631)
Income (loss) before taxes | $ | 760,181 |  | $ | 237,067 |  | $ | 1,133,276 |  | $ | 193,445
Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market |
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
(Dollars in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
United Kingdom gross written premium | $ | 249,314 |  | $ | 236,100 |  | $ | 615,462 |  | $ | 542,808

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- Definition Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph a -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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