Annual report pursuant to Section 13 and 15(d)

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

v3.23.1
Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ 96,494 $ 97,929 $ 96,724
Other comprehensive (loss) income before reclassifications 1,515 151  
Amounts reclassified from accumulated other comprehensive loss (523) (775)  
Total other comprehensive (loss) income (992) 926 2,159
Ending Balance 96,933 96,494 97,929
Pension and Other Postretirement Benefits Items [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (6,970) (7,698)  
Other comprehensive (loss) income before reclassifications 1,023 (47)  
Amounts reclassified from accumulated other comprehensive loss (523) (775)  
Total other comprehensive (loss) income (500) 728  
Ending Balance (7,470) (6,970) (7,698)
Foreign Currency Items [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance 499 (301)  
Other comprehensive (loss) income before reclassifications 492 198  
Amounts reclassified from accumulated other comprehensive loss 0 0  
Total other comprehensive (loss) income (492) 198  
Ending Balance 7 499 (301)
Accumulated Other Comprehensive Loss [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (6,471) (7,397) (9,556)
Ending Balance $ (7,463) $ (6,471) $ (7,397)