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v3.20.4

Segment Reporting (Schedule Of Underwriting Results For Operating Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross written premiums |  |  |  |  |  |  |  |  | $ 3,217,999 | $ 2,783,036 | $ 2,240,951
Net written premiums | $ 2,449,346 | $ 2,448,680 | $ 2,017,478 | $ 2,201,479 | $ 2,120,186 | $ 2,068,557 | $ 1,783,983 | $ 1,851,698 | 9,116,983 | 7,824,424 | 7,414,428
Premiums earned | $ 2,396,483 | $ 2,205,811 | $ 2,042,405 | $ 2,036,814 | $ 1,948,071 | $ 1,905,619 | $ 1,817,299 | $ 1,732,697 | 8,681,513 | 7,403,686 | 6,931,699
Incurred losses and LAE |  |  |  |  |  |  |  |  | 6,550,837 | 4,922,898 | 5,651,403
Commission and brokerage |  |  |  |  |  |  |  |  | 1,873,250 | 1,703,726 | 1,519,030
Other Underwriting Expenses |  |  |  |  |  |  |  |  | 511,237 | 440,899 | 371,541
Underwriting gain (loss) |  |  |  |  |  |  |  |  | (253,811) | 336,163 | (610,275)
Reinsurance [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross written premiums |  |  |  |  |  |  |  |  | 7,281,716 | 6,355,889 | 6,224,601
Net written premiums |  |  |  |  |  |  |  |  | 6,767,579 | 5,732,272 | 5,706,453
Premiums earned |  |  |  |  |  |  |  |  | 6,466,106 | 5,491,296 | 5,293,071
Incurred losses and LAE |  |  |  |  |  |  |  |  | 4,933,411 | 3,675,178 | 4,585,602
Commission and brokerage |  |  |  |  |  |  |  |  | 1,552,371 | 1,400,247 | 1,251,581
Other Underwriting Expenses |  |  |  |  |  |  |  |  | 175,734 | 160,834 | 142,874
Underwriting gain (loss) |  |  |  |  |  |  |  |  | (195,410) | 255,037 | (686,986)
Insurance [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross written premiums |  |  |  |  |  |  |  |  | 3,200,645 | 2,777,475 | 2,250,552
Net written premiums |  |  |  |  |  |  |  |  | 2,349,404 | 2,092,152 | 1,707,975
Premiums earned |  |  |  |  |  |  |  |  | 2,215,407 | 1,912,390 | 1,638,628
Incurred losses and LAE |  |  |  |  |  |  |  |  | 1,617,426 | 1,247,720 | 1,065,801
Commission and brokerage |  |  |  |  |  |  |  |  | 320,879 | 303,479 | 267,449
Other Underwriting Expenses |  |  |  |  |  |  |  |  | 335,503 | 280,065 | 228,667
Underwriting gain (loss) |  |  |  |  |  |  |  |  | $ (58,401) | $ 81,126 | $ 76,711

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- Definition Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(1)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17(Column E)) -URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(c)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition The difference between the price paid by the public and the contract price less the related expenses. A broker-dealer may underwrite a security offering by contracting to buy the issue either at a fixed price or a price based on selling the offering on a best-effort basis. + References No definition available. + Details
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