Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.3
Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance $ 99,721 $ 97,051 $ 96,933 $ 96,494
Other comprehensive income before reclassifications     (310) (680)
Amounts reclassified from accumulated other comprehensive loss     328 262
Net current-period other comprehensive income (loss) 106 (206) 18 (418)
Ending Balance 100,795 96,966 100,795 96,966
Pension and Other Postretirement Benefits Items [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance     (7,470) (6,970)
Other comprehensive income before reclassifications     0 0
Amounts reclassified from accumulated other comprehensive loss     328 262
Net current-period other comprehensive income (loss)     328 262
Ending Balance (7,142) (6,708) (7,142) (6,708)
Foreign Currency Items [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance     7 499
Other comprehensive income before reclassifications     (310) (680)
Amounts reclassified from accumulated other comprehensive loss     0 0
Net current-period other comprehensive income (loss)     (310) (680)
Ending Balance (303) (181) (303) (181)
Accumulated Other Comprehensive Loss [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (7,551) (6,683) (7,463) (6,471)
Ending Balance $ (7,445) $ (6,889) $ (7,445) $ (6,889)