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Changes in Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Loss by Component | The changes in accumulated other comprehensive loss by component for the nine months ended December 31, 2020 and 2019 are as follows:
|  | Pension and Other Postretirement Benefit Items |  |  | Foreign Currency Items |  |  | Total |
Balance at April 1, 2020 |  | $ | (9,472 | ) |  | $ | (84 | ) |  | $ | (9,556 | )
Other comprehensive income before reclassifications |  |  | — |  |  |  | 416 |  |  |  | 416 |
Amounts reclassified from accumulated other comprehensive loss |  |  | 614 |  |  |  | — |  |  |  | 614 |
Net current-period other comprehensive income |  |  | 614 |  |  |  | 416 |  |  |  | 1,030 |
Balance at December 31, 2020 |  | $ | (8,858 | ) |  | $ | 332 |  |  | $ | (8,526 | )
|  | Pension and Other Postretirement Benefit Items |  |  | Foreign Currency Items |  |  | Total |
Balance at April 1, 2019 |  | $ | (8,947 | ) |  | $ | 114 |  |  | $ | (8,833 | )
Other comprehensive loss before reclassifications |  |  | — |  |  |  | (135 | ) |  |  | (135 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | 583 |  |  |  | — |  |  |  | 583 |
Net current-period other comprehensive income (loss) |  |  | 583 |  |  |  | (135 | ) |  |  | 448 |
Balance at December 31, 2019 |  | $ | (8,364 | ) |  | $ | (21 | ) |  | $ | (8,385 | )
Reclassifications Out of Accumulated Other Comprehensive Loss by Component | The reclassifications out of accumulated other comprehensive loss by component for the three and nine months ended December 31, 2020 and 2019 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 |  |  |  |
|  | December 31, |  |  |  |
|  | 2020 |  |  |  | 2019 |  |  |  |
Pension and other postretirement benefit items: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial loss |  | $ | (266 | ) | (1) |  | $ | (249 | ) | (1) |  | Income before provision for income taxes
|  |  | (61 | ) |  |  |  | (55 | ) |  |  | Provision for income taxes
|  | $ | (205 | ) |  |  | $ | (194 | ) |  |  | 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
|  | Nine Months Ended |  |  |  |
|  | December 31, |  |  |  |
|  | 2020 |  |  |  | 2019 |  |  |  |
Pension and other postretirement benefit items: |  |  |  |  |  |  |  |  |  |  |  |
Amortization of actuarial loss |  | $ | (799 | ) | (1) |  | $ | (747 | ) | (1) |  | Income before provision for income taxes
|  |  | (185 | ) |  |  |  | (164 | ) |  |  | Provision for income taxes
|  | $ | (614 | ) |  |  | $ | (583 | ) |  |  | Net income
(1) | These accumulated other comprehensive loss components are included within the computation of pension and other postretirement benefit costs. See Note 9.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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