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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2021
Stockholders' Equity Note [Abstract] |
Changes in Accumulated Other Comprehensive Loss [Table Text Block] | The following table details the changes in accumulated other comprehensive loss for the three months ended March 31, 2021 and 2020:
| Three Months Ended March 31 |  |
| 2021 |  | 2020 |  |  |  |
| (thousands)
Beginning balance, net of taxes | $ | (1,078) |  |  | $ | (50,248) |  |  |  |  |
Amortization of actuarial (gain) loss, before taxes (a) | (5) |  |  | 202 |  |  |  |  |
Effect of settlements, before taxes (a) | — |  |  | 86 |  |  |  |  |
Income taxes | 1 |  |  | (73) |  |  |  |  |
Ending balance, net of taxes | $ | (1,082) |  |  | $ | (50,033) |  |  |  |  |
___________________________________ (a) Represents amounts reclassified from accumulated other comprehensive loss. These amounts are included in the computation of net periodic pension cost. For additional information, see Note 8, Retirement and Benefit Plans.

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