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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax | Amounts included in accumulated other comprehensive loss, net of tax, were as follows:
| Unrecognized Net Defined Benefit Plan Costs |  | Change in Fair Value of Derivatives |  | Foreign Currency Translation |  | Total
| (Dollars in thousands)
Balance at December 31, 2022 | $ | (156,733) |  |  | $ | (772) |  |  | $ | (187,805) |  |  | $ | (345,310) |
Other comprehensive income before reclassifications | — |  |  | (1,714) |  |  | 19,721 |  |  | 18,007 |
Amounts reclassified from accumulated other comprehensive loss | 2,306 |  |  | 427 |  |  | — |  |  | 2,733 |
Other comprehensive income | 2,306 |  |  | (1,287) |  |  | 19,721 |  |  | 20,740 |
Balance at March 31, 2023 | $ | (154,427) |  |  | $ | (2,059) |  |  | $ | (168,084) |  |  | $ | (324,570) |

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