Annual report pursuant to Section 13 and 15(d)

Equity Method Investment - Schedule Of Losses On Geneva Re's Investment Portfolio (Details)

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Equity Method Investment - Schedule Of Losses On Geneva Re's Investment Portfolio (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]      
Equity Method Investments - Beginning Balance $ 38,514 $ 45,417  
Loss (income) from equity method investment in related party (8,731) 414 $ 759
Change in share of equity method investment in related party other comprehensive loss (1,146) (6,489)  
Equity Method Investments - Ending Balance $ 46,099 $ 38,514 $ 45,417