v3.26.1
Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income tax expense (benefit) $ 3,343 $ 2,785 $ 4,612 $ 1,680
Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassifications, net of tax 36 33 22 23
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available for Sale Securities        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other net realized investment losses 46 34 25 21
Income tax expense (benefit) $ (10) $ (1) $ (3) $ 2