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Changes in Other Comprehensive Loss (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Sep. 30, 2018
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Beginning balance net of tax |  | $ (90,908,000) | $ (83,052,000) |
Other comprehensive income (loss) before reclassification |  | 1,811,000 | (1,945,000) |
Amounts reclassified from other comprehensive loss |  | 4,337,000 | 237,000 |
Net current period other comprehensive income (loss) |  | 6,148,000 | (1,708,000) |
Ending balance net of tax |  | (84,760,000) | (84,760,000) |
Retirement Obligations |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Beginning balance net of tax |  | (54,962,000) | (55,145,000) |
Other comprehensive income (loss) before reclassification |  | (567,000) | (1,175,000) |
Amounts reclassified from other comprehensive loss |  | 374,000 | 1,165,000 |
Net current period other comprehensive income (loss) |  | (193,000) | (10,000) |
Ending balance net of tax |  | (55,155,000) | (55,155,000) |
Foreign currency exchange (gain) loss |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Beginning balance net of tax |  | (32,430,000) | (25,355,000) |
Other comprehensive income (loss) before reclassification |  | 5,479,000 | (1,596,000) |
Amounts reclassified from other comprehensive loss |  | 0 | 0 |
Net current period other comprehensive income (loss) |  | 5,479,000 | (1,596,000) |
Ending balance net of tax |  | (26,951,000) | (26,951,000) |
Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | 5,292,000 | (1,239,000) |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax |  | 3,963,000 | (928,000) |
Tax expense | Retirement Obligations |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | (125,000) | (395,000) |
Tax expense | Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | (1,329,000) | 311,000 |
Cost of products sold | Retirement Obligations |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss | [1] | 499,000 | 1,560,000 |
Cost of products sold | Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | (65,000) | (76,000) |
Interest Expense [Member] | Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | 0 | (479,000) |
Foreign currency exchange (gain) loss | Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amounts reclassified from other comprehensive loss |  | 5,357,000 | (684,000) |
Change in Derivatives Qualifying as Hedges |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Beginning balance net of tax |  | (3,516,000) | (2,552,000) |
Other comprehensive income (loss) before reclassification |  | (3,101,000) | 826,000 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax |  | 3,963,000 | (928,000) |
Net current period other comprehensive income (loss) |  | 862,000 | (102,000) |
Ending balance net of tax |  | $ (2,654,000) | $ (2,654,000) |
Accounting Standards Update 2016-01 [Member] |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  | $ (888,000)
[1] | 14. Changes in Accumulated Other Comprehensive Loss Changes in AOCL by component for the three and nine-month period ended December 31, 2019 are as follows (in thousands):
|  | Three months ended December 31, 2019
|  | Retirement Obligations |  | Foreign Currency |  | Change in Derivatives Qualifying as Hedges |  | Total
Beginning balance net of tax |  | $ | (54,962 | ) |  | $ | (32,430 | ) |  | $ | (3,516 | ) |  | $ | (90,908 | )
Other comprehensive income (loss) before reclassification |  | (567 | ) |  | 5,479 |  |  | (3,101 | ) |  | 1,811 |
Amounts reclassified from other comprehensive loss |  | 374 |  |  | — |  |  | 3,963 |  |  | 4,337 |
Net current period other comprehensive income (loss) |  | (193 | ) |  | 5,479 |  |  | 862 |  |  | 6,148 |
Ending balance net of tax |  | $ | (55,155 | ) |  | $ | (26,951 | ) |  | $ | (2,654 | ) |  | $ | (84,760 | )
|  | Nine months ended December 31, 2019
|  | Retirement Obligations |  | Foreign Currency |  | Change in Derivatives Qualifying as Hedges |  | Total
Beginning balance net of tax |  | $ | (55,145 | ) |  | $ | (25,355 | ) |  | $ | (2,552 | ) |  | $ | (83,052 | )
Other comprehensive income (loss) before reclassification |  | (1,175 | ) |  | (1,596 | ) |  | 826 |  |  | (1,945 | )
Amounts reclassified from other comprehensive loss |  | 1,165 |  |  | — |  |  | (928 | ) |  | 237 |
Net current period other comprehensive income (loss) |  | (10 | ) |  | (1,596 | ) |  | (102 | ) |  | (1,708 | )
Ending balance net of tax |  | $ | (55,155 | ) |  | $ | (26,951 | ) |  | $ | (2,654 | ) |  | $ | (84,760 | )
Details of amounts reclassified out of AOCL for the three-month period ended December 31, 2019 are as follows (in thousands):
Details of AOCL Components |  | Amount reclassified from AOCL |  | Affected line item on Condensed Consolidated Statement of Operations
Net amortization of prior service cost and pension settlement |  |  |  |  |
|  | $ | 499 |  |  | (1)
|  | 499 |  |  | Total before tax
|  | (125 | ) |  | Tax (benefit) expense
|  | $ | 374 |  |  | Net of tax
Change in derivatives qualifying as hedges |  |  |  |  |
|  | $ | (65 | ) |  | Cost of products sold
|  | — |  |  | Interest expense
|  | 5,357 |  |  | Foreign currency
|  | 5,292 |  |  | Total before tax
|  | (1,329 | ) |  | Tax (benefit) expense
|  | $ | 3,963 |  |  | Net of tax
Details of amounts reclassified out of AOCL for the nine-month period ended December 31, 2019 are as follows (in thousands):
Details of AOCL Components |  | Amount reclassified from AOCL |  | Affected line item on Condensed Consolidated Statement of Operations
Net amortization of prior service cost and pension settlement |  |  |  |  |
|  | $ | 1,560 |  |  | (1)
|  | 1,560 |  |  | Total before tax
|  | (395 | ) |  | Tax (benefit) expense
|  | $ | 1,165 |  |  | Net of tax
Change in derivatives qualifying as hedges |  |  |  |  |
|  | $ | (76 | ) |  | Cost of products sold
|  | (479 | ) |  | Interest expense
|  | (684 | ) |  | Foreign currency
|  | (1,239 | ) |  | Total before tax
|  | 311 |  |  | Tax (benefit) expense
|  | $ | (928 | ) |  | Net of tax
(1) These AOCL components are included in the computation of net periodic pension cost. (See Note 10 — Net Periodic Benefit Cost for additional details.)

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