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, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Dec. 31, 2023 |
Sep. 30, 2023 |
Jun. 30, 2023 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||
| Beginning balance | $ 112,474 | $ 108,188 | $ 105,566 | $ 100,795 | $ 99,721 | $ 96,933 | $ 105,566 | $ 96,933 |
| Other comprehensive income (loss) before reclassifications | (208) | 131 | (28) | 137 | (58) | (252) | ||
| Amounts reclassified from accumulated other comprehensive loss | 151 | 150 | 150 | 164 | 164 | 164 | ||
| Total other comprehensive (expense) income | (57) | 281 | 122 | 301 | 106 | (88) | 346 | 319 |
| Ending Balance | 114,431 | 112,474 | 108,188 | 103,756 | 100,795 | 99,721 | 114,431 | 103,756 |
| Pension and Other Postretirement Benefits Items [Member] | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||
| Beginning balance | (6,476) | (6,626) | (6,776) | (7,142) | (7,306) | (7,470) | (6,776) | (7,470) |
| Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Amounts reclassified from accumulated other comprehensive loss | 151 | 150 | 150 | 164 | 164 | 164 | ||
| Total other comprehensive (expense) income | 151 | 150 | 150 | 164 | 164 | 164 | ||
| Ending Balance | (6,325) | (6,476) | (6,626) | (6,978) | (7,142) | (7,306) | (6,325) | (6,978) |
| Foreign Currency Items [Member] | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||
| Beginning balance | (134) | (265) | (237) | (303) | (245) | 7 | (237) | 7 |
| Other comprehensive income (loss) before reclassifications | (208) | 131 | (28) | 137 | (58) | (252) | ||
| Amounts reclassified from accumulated other comprehensive loss | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Total other comprehensive (expense) income | (208) | 131 | (28) | 137 | (58) | (252) | ||
| Ending Balance | (342) | (134) | (265) | (166) | (303) | (245) | (342) | (166) |
| Accumulated Other Comprehensive Loss [Member] | ||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||
| Beginning balance | (6,610) | (6,891) | (7,013) | (7,445) | (7,551) | (7,463) | (7,013) | (7,463) |
| Ending Balance | $ (6,667) | $ (6,610) | $ (6,891) | $ (7,144) | $ (7,445) | $ (7,551) | $ (6,667) | $ (7,144) |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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