Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ 98,966 $ 103,349
Other comprehensive loss before reclassifications (87) (199)
Amounts reclassified from accumulated other comprehensive loss 194 170
Total other comprehensive income (loss) 107 (29)
Ending Balance 97,945 103,952
Pension and Other Postretirement Benefits Items [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (8,947) (8,599)
Amounts reclassified from accumulated other comprehensive loss 194 170
Total other comprehensive income (loss) 194 170
Ending Balance (8,753) (8,429)
Foreign Currency Items [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 114 349
Other comprehensive loss before reclassifications (87) (199)
Total other comprehensive income (loss) (87) (199)
Ending Balance 27 150
Accumulated Other Comprehensive Loss [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (8,833) (8,250)
Ending Balance $ (8,726) $ (8,279)