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Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2020
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, 2019 | $ | (139,102) |  |  | $ | (3,182) |  |  | $ | (117,458) |  |  | $ | (259,742) |
Other comprehensive loss before reclassifications | (872) |  |  | (3,192) |  |  | (38,015) |  |  | (42,079) |
Amounts reclassified from accumulated other comprehensive loss | 3,620 |  |  | 841 |  |  | — |  |  | 4,461 |
Other comprehensive loss | 2,748 |  |  | (2,351) |  |  | (38,015) |  |  | (37,618) |
Balance at June 30, 2020 | $ | (136,354) |  |  | $ | (5,533) |  |  | $ | (155,473) |  |  | $ | (297,360) |

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