v3.25.4

Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2025 | Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance | $ 127,590 | $ 123,384 | $ 119,577 | $ 112,474 | $ 108,188 | $ 105,566 | $ 119,577 | $ 105,566
Other comprehensive income (loss) before reclassifications | 72 | (56) | 50 | (208) | 131 | (28) |  |
Amounts reclassified from accumulated other comprehensive loss | 161 | 161 | 162 | 151 | 150 | 150 |  |
Total other comprehensive income (loss) | 233 | 105 | 212 | (57) | 281 | 122 | 550 | 346
Ending Balance | 131,310 | 127,590 | 123,384 | 114,431 | 112,474 | 108,188 | 131,310 | 114,431
Pension and Other Postretirement Benefits Items [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance | (6,348) | (6,509) | (6,671) | (6,476) | (6,626) | (6,776) | (6,671) | (6,776)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0 | 0 | 0 |  |
Amounts reclassified from accumulated other comprehensive loss | 161 | 161 | 162 | 151 | 150 | 150 |  |
Total other comprehensive income (loss) | 161 | 161 | 162 | 151 | 150 | 150 |  |
Ending Balance | (6,187) | (6,348) | (6,509) | (6,325) | (6,476) | (6,626) | (6,187) | (6,325)
Foreign Currency Items [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance | (322) | (266) | (316) | (134) | (265) | (237) | (316) | (237)
Other comprehensive income (loss) before reclassifications | 72 | (56) | 50 | (208) | 131 | (28) |  |
Amounts reclassified from accumulated other comprehensive loss | 0 | 0 | 0 | 0 | 0 | 0 |  |
Total other comprehensive income (loss) | 72 | (56) | 50 | (208) | 131 | (28) |  |
Ending Balance | (250) | (322) | (266) | (342) | (134) | (265) | (250) | (342)
Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning balance | (6,670) | (6,775) | (6,987) | (6,610) | (6,891) | (7,013) | (6,987) | (7,013)
Ending Balance | $ (6,437) | $ (6,670) | $ (6,775) | $ (6,667) | $ (6,610) | $ (6,891) | $ (6,437) | $ (6,667)

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