v3.26.1
Investments - Summary of Sales of Available-for-sale Fixed-Maturity Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Schedule of Available-for-sale Securities [Line Items]    
Proceeds $ 1,878 $ 2,610
Fixed-Maturity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Proceeds 1,878 2,610
Gross Realized Gains 49 24
Gross Realized Losses $ 0 $ (4)