XML 27 R126.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Segment Reporting (Schedule Of Underwriting Results For Operating Segments) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]                      
Gross written premiums                 $ 2,783,036 $ 2,240,951 $ 2,083,555
Net written premiums $ 2,120,186 $ 2,068,557 $ 1,783,983 $ 1,851,698 $ 2,057,071 $ 1,938,773 $ 1,746,378 $ 1,672,206 7,824,424 7,414,428 6,244,661
Premiums earned $ 1,948,071 $ 1,905,619 $ 1,817,299 $ 1,732,697 $ 1,850,975 $ 1,731,479 $ 1,729,818 $ 1,619,427 7,403,686 6,931,699 5,937,840
Incurred losses and LAE                 4,922,898 5,651,403 4,522,581
Commission and brokerage                 1,703,726 1,519,030 1,303,963
Other underwriting expenses                 440,899 371,541 318,817
Underwriting gain (loss)                 336,163 (610,275) (207,521)
U.S. Reinsurance [Member]                      
Segment Reporting Information [Line Items]                      
Gross written premiums                 2,962,416 3,014,338 2,592,972
Net written premiums                 2,513,579 2,642,182 2,245,422
Premiums earned                 2,471,447 2,528,991 2,181,160
Incurred losses and LAE                 1,514,151 2,784,181 1,632,795
Commission and brokerage                 703,803 568,374 462,487
Other underwriting expenses                 68,796 60,266 55,881
Underwriting gain (loss)                 184,697 (883,830) 29,997
International [Member]                      
Segment Reporting Information [Line Items]                      
Gross written premiums                 1,648,598 1,543,946 1,316,701
Net written premiums                 1,551,753 1,458,745 1,229,597
Premiums earned                 1,475,669 1,439,882 1,202,043
Incurred losses and LAE                 1,193,816 992,704 1,059,640
Commission and brokerage                 342,400 364,010 287,688
Other underwriting expenses                 41,690 39,042 38,844
Underwriting gain (loss)                 (102,237) 44,126 (184,129)
Bermuda [Member]                      
Segment Reporting Information [Line Items]                      
Gross written premiums                 1,744,875 1,666,317 1,205,001
Net written premiums                 1,666,940 1,605,526 1,139,082
Premiums earned                 1,544,180 1,324,198 1,093,250
Incurred losses and LAE                 967,211 808,717 735,292
Commission and brokerage                 354,044 319,197 303,707
Other underwriting expenses                 50,348 43,566 38,011
Underwriting gain (loss)                 172,577 152,718 16,240
Insurance [Member]                      
Segment Reporting Information [Line Items]                      
Gross written premiums                 2,777,475 2,250,552 2,059,248
Net written premiums                 2,092,152 1,707,975 1,630,560
Premiums earned                 1,912,390 1,638,628 1,461,387
Incurred losses and LAE                 1,247,720 1,065,801 1,094,854
Commission and brokerage                 303,479 267,449 250,081
Other underwriting expenses                 280,065 228,667 186,081
Underwriting gain (loss)                 $ 81,126 $ 76,711 $ (69,629)