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Changes in Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Loss by Component | The changes in accumulated other comprehensive loss by component for the three and six months ended September 30, 2025 and 2024 are as follows:
|  | Pension and Other Postretirement Benefit Items |  |  | Foreign Currency Items |  |  | Total |
Balance at April 1, 2025 |  | $ | (6,671 | ) |  | $ | (316 | ) |  | $ | (6,987 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | 50 |  |  |  | 50 |
Amounts reclassified from accumulated other comprehensive loss |  |  | 162 |  |  |  | — |  |  |  | 162 |
Net current-period other comprehensive income |  |  | 162 |  |  |  | 50 |  |  |  | 212 |
Balance at June 30, 2025 |  |  | (6,509 | ) |  |  | (266 | ) |  |  | (6,775 | )
Other comprehensive loss before reclassifications |  |  | — |  |  |  | (56 | ) |  |  | (56 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | 161 |  |  |  | — |  |  |  | 161 |
Net current-period other comprehensive income (loss) |  |  | 161 |  |  |  | (56 | ) |  |  | 105 |
Balance at September 30, 2025 |  | $ | (6,348 | ) |  | $ | (322 | ) |  | $ | (6,670 | )
|  | Pension and Other Postretirement Benefit Items |  |  | Foreign Currency Items |  |  | Total |
Balance at April 1, 2024 |  | $ | (6,776 | ) |  | $ | (237 | ) |  | $ | (7,013 | )
Other comprehensive loss before reclassifications |  |  | — |  |  |  | (28 | ) |  |  | (28 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | 150 |  |  |  | — |  |  |  | 150 |
Net current-period other comprehensive income (loss) |  |  | 150 |  |  |  | (28 | ) |  |  | 122 |
Balance at June 30, 2024 |  |  | (6,626 | ) |  |  | (265 | ) |  |  | (6,891 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | 131 |  |  |  | 131 |
Amounts reclassified from accumulated other comprehensive loss |  |  | 150 |  |  |  | — |  |  |  | 150 |
Net current-period other comprehensive income |  |  | 150 |  |  |  | 131 |  |  |  | 281 |
Balance at September 30, 2024 |  | $ | (6,476 | ) |  | $ | (134 | ) |  | $ | (6,610 | )
Reclassifications Out of Accumulated Other Comprehensive Loss by Component | The reclassifications out of accumulated other comprehensive loss by component for the three and six months ended September 30, 2025 and 2024 are as follows:
Details about Accumulated Other Comprehensive Loss Components |  | Amount Reclassified from Accumulated Other Comprehensive Loss |  |  |  | Affected Line Item in the Condensed Consolidated Statements of Income
|  | Three Months Ended |  |  |  |
|  | September 30, |  |  |  |
|  | 2025 |  |  |  | 2024 |  |  |  |
Pension and other postretirement benefit items: |  |  |  |  |  |  |  |  |  |
Amortization of actuarial loss |  | $ | 210 |  | (1) |  | $ | 195 |  | (1) |  | Income before provision for income taxes
Tax effect |  |  | 49 |  |  |  |  | 45 |  |  |  | Provision for income taxes
|  | $ | 161 |  |  |  | $ | 150 |  |  |  | Net income
Details about Accumulated Other Comprehensive Loss Components |  | Amount Reclassified from Accumulated Other Comprehensive Loss |  |  |  | Affected Line Item in the Condensed Consolidated Statements of Income
|  | Six Months Ended |  |  |  |
|  | September 30, |  |  |  |
|  | 2025 |  |  |  | 2024 |  |  |  |
Pension and other postretirement benefit items: |  |  |  |  |  |  |  |  |  |
Amortization of actuarial loss |  | $ | 420 |  | (1) |  | $ | 390 |  | (1) |  | Income before provision for income taxes
Tax effect |  |  | 97 |  |  |  |  | 90 |  |  |  | Provision for income taxes
|  | $ | 323 |  |  |  | $ | 300 |  |  |  | Net income
(1) These accumulated other comprehensive loss components are included within the computation of pension and other postretirement benefit costs.

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