Quarterly report [Sections 13 or 15(d)]

Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail)

v3.26.3
Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income before benefit for income taxes $ 5,970 $ 4,223 $ 10,153 $ 9,236
Provision for income taxes 1,333 1,133 1,604 1,551
Net Income (Loss) 4,637 3,090 8,549 7,685
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] 173 210 346 420
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 49 82 97
Net Income (Loss) $ 132 $ 161 $ 264 $ 323
[1] These accumulated other comprehensive loss components are included within the computation of pension and other postretirement benefit costs.