v3.26.1
Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before benefit for income taxes $ 4,183 $ 5,013
Provision for income taxes 271 418
Net Income (Loss) 3,912 4,595
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Actuarial income (loss) [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before benefit for income taxes [1] 173 210
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Pension and Other Postretirement Benefits Items [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Provision for income taxes 41 48
Net Income (Loss) $ 132 $ 162
[1] These accumulated other comprehensive loss components are included within the computation of pension and other postretirement benefit costs.