v3.25.2
Investments - Investment Income (Loss) Summarized (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Schedule Of Investments [Line Items]        
Net income loss from limited partnership interests     $ (658) $ 85
Real estate investments $ 455 $ 3,783 773 5,276
Net Investment Income 16,445 16,881 30,196 30,948
Available-for-Sale-Fixed-Maturity Securities [Member]        
Schedule Of Investments [Line Items]        
Investment income 6,841 6,020 14,355 10,848
Equity Securities [Member]        
Schedule Of Investments [Line Items]        
Investment income 660 511 1,147 952
Investment Expense [Member]        
Schedule Of Investments [Line Items]        
Investment expense (154) (141) (339) (220)
Limited Partnership Investment [Member]        
Schedule Of Investments [Line Items]        
Net income loss from limited partnership interests (32) (110) (658) 85
Cash and Cash Equivalents [Member]        
Schedule Of Investments [Line Items]        
Investment income $ 8,675 $ 6,818 $ 14,918 $ 14,007