XML 132 R111.htm IDEA: XBRL DOCUMENT v3.3.1.900
Segment Reporting (Schedule Of Gross Premiums Written Allocated To the Territory Of Coverage Exposure) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written $ 336,093 $ 369,642 $ 661,997 $ 643,578 $ 132,780 $ 200,992 $ 511,540 $ 705,260 $ 2,011,310 $ 1,550,572 $ 1,605,412
Catastrophe Reinsurance                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 868,631 933,969 1,120,379
Catastrophe Reinsurance | U.S. and Caribbean                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 565,115 573,696 782,211
Catastrophe Reinsurance | Worldwide                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 168,447 157,674 99,179
Catastrophe Reinsurance | Worldwide (excluding U.S.)                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 65,390 123,476 146,048
Catastrophe Reinsurance | Japan                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 29,959 31,484 39,060
Catastrophe Reinsurance | Europe                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 17,625 25,353 25,659
Catastrophe Reinsurance | Australia and New Zealand                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 15,185 20,807 22,460
Catastrophe Reinsurance | Other                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 6,910 1,479 5,762
Specialty Reinsurance                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 766,051 346,638 259,489
Specialty Reinsurance | U.S. and Caribbean                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 475,447 169,045 91,203
Specialty Reinsurance | Worldwide                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 200,693 161,329 151,879
Specialty Reinsurance | Worldwide (excluding U.S.)                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 83,681 7,506 1,661
Specialty Reinsurance | Europe                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 3,362 460 2,612
Specialty Reinsurance | Australia and New Zealand                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 1,145 6,898 12,068
Specialty Reinsurance | Other                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 1,723 1,400 66
Lloyd's                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 376,718 269,656 226,532
Lloyd's | U.S. and Caribbean                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 154,104 120,066 88,535
Lloyd's | Worldwide                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 186,113 118,190 104,249
Lloyd's | Worldwide (excluding U.S.)                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 14,896 13,655 8,071
Lloyd's | Japan                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 2,432 2,695 1,907
Lloyd's | Europe                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 12,922 7,609 14,763
Lloyd's | Australia and New Zealand                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 1,166 2,907 2,948
Lloyd's | Other                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 5,085 4,534 6,059
Other                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                 $ (90) 309 (988)
Intersegment Eliminations                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Gross premiums written                   $ (300) $ (1,000)