XML 82 R66.htm IDEA: XBRL DOCUMENT v3.10.0.1
Investments (Schedule of Net Realized and Unrealized Gains on Investments) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Gain (Loss) on Securities [Line Items]                      
Net realized and unrealized (losses) gains on equity investments trading                 $ (39,161) $ 119,544 $ 95,364
Net realized and unrealized (losses) gains on investments $ (88,654) $ 13,630 $ (17,901) $ (82,144) $ (7,716) $ 42,052 $ 58,113 $ 43,373 (175,069) 135,822 141,328
Fixed maturity investments                      
Gain (Loss) on Securities [Line Items]                      
Gross realized gains                 21,284 49,121 72,739
Gross realized losses                 (91,098) (38,832) (38,315)
Net realized (losses) gains on fixed maturity investments                 (69,814) 10,289 34,424
Net unrealized (losses) gains on fixed maturity investments trading                 (57,310) 8,479 26,954
Investments-related derivatives                      
Gain (Loss) on Securities [Line Items]                      
Net realized and unrealized losses on investments-related derivatives                 (8,784) (2,490) (15,414)
Equity investments                      
Gain (Loss) on Securities [Line Items]                      
Net realized gains on equity investments trading sold during the period                 27,739 80,027 14,190
Net unrealized (losses) gains on equity investments trading still held at reporting date                 $ (66,900) $ 39,517 $ 81,174