Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income (loss) before benefit for income taxes $ (236) $ (672) $ 655 $ (4,543)
Benefit for income taxes (40) (180) 175 (925)
Net income (loss) (196) (492) 480 (3,618)
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 (loss) before benefit for income taxes [1] 168 (236)    
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]        
Benefit for income taxes 37 (53) 74 (102)
Net income (loss) $ 131 $ (183) 262 (353)
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Actuarial (loss) [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income (loss) before benefit for income taxes [1]     $ 336 $ (455)
[1] These accumulated other comprehensive loss components are included within the computation of pension and other postretirement benefit costs. See Note 9.