v3.25.2
Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ 119,577 $ 105,566
Other comprehensive income (loss) before reclassifications 50 (28)
Amounts reclassified from accumulated other comprehensive loss 162 150
Total other comprehensive (expense) income 212 122
Ending Balance 123,384 108,188
Pension and Other Postretirement Benefits Items [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (6,671) (6,776)
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive loss 162 150
Total other comprehensive (expense) income 162 150
Ending Balance (6,509) (6,626)
Foreign Currency Items [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (316) (237)
Other comprehensive income (loss) before reclassifications 50 (28)
Amounts reclassified from accumulated other comprehensive loss 0 0
Total other comprehensive (expense) income 50 (28)
Ending Balance (266) (265)
Accumulated Other Comprehensive Loss [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (6,987) (7,013)
Ending Balance $ (6,775) $ (6,891)