XML 86 R73.htm IDEA: XBRL DOCUMENT v3.21.2
Segment Reporting (Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
United Kingdom [Member]        
Segment Reporting Information [Line Items]        
Gross written premium $ 281,645 $ 314,502 $ 897,107 $ 857,310