v3.25.1
Investments - Summary of Sales of Available-for-sale Fixed-Maturity Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Schedule of Available-for-sale Securities [Line Items]    
Proceeds $ 2,610 $ 6,030
Fixed-Maturity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Proceeds 2,610 6,030
Gross Realized Gains 24 12
Gross Realized Losses $ (4) $ (44)