v3.26.1
Investments - Summary of Sales of Available-for-sale Fixed-Maturity Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Schedule of Available-for-sale Securities [Line Items]        
Proceeds     $ 3,643 $ 3,359
Fixed-Maturity Securities [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Proceeds $ 1,765 $ 749 3,643 3,359
Gross Realized Gains 6 14 55 38
Gross Realized Losses $ (8) $ 0 $ (8) $ (4)