v3.26.3
Investments - Summary of Sales of Available-for-sale Fixed-Maturity Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Schedule of Available-for-sale Securities [Line Items]        
Proceeds     $ 5,521 $ 6,139
Fixed-Maturity Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Proceeds $ 1,878 $ 2,780 5,521 6,139
Gross Realized Gains 14 34 69 72
Gross Realized Losses $ (1) $ (1) $ (9) $ (5)