v3.26.1
Investments (Schedule of a Roll Forward of Cumulative Credit Losses Recorded in Earnings Related to Impaired Debt Securities) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Allowance for credit loss beginning balance $ 4,306 $ 3,399
No allowance for credit losses has been previously recognized   153
An allowance for credit losses was recorded in a previous period   1,727
Securities sold during the period (7) (1,623)
Allowance for credit loss ending balance 4,299 3,656
Corporate Debt    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Allowance for credit loss beginning balance 3,767 2,608
No allowance for credit losses has been previously recognized   0
An allowance for credit losses was recorded in a previous period   1,727
Securities sold during the period 0 (1,210)
Allowance for credit loss ending balance 3,767 3,125
Residential mortgage-backed securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Allowance for credit loss beginning balance 210 197
No allowance for credit losses has been previously recognized   0
An allowance for credit losses was recorded in a previous period   0
Securities sold during the period (6) (5)
Allowance for credit loss ending balance 204 192
Other commercial mortgage-backed securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Allowance for credit loss beginning balance 62 406
No allowance for credit losses has been previously recognized   62
An allowance for credit losses was recorded in a previous period   0
Securities sold during the period 0 (406)
Allowance for credit loss ending balance 62 62
Other asset-backed securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Allowance for credit loss beginning balance 267 188
No allowance for credit losses has been previously recognized   91
An allowance for credit losses was recorded in a previous period   0
Securities sold during the period (1) (2)
Allowance for credit loss ending balance $ 266 $ 277