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Accumulated other comprehensive loss (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Loss | The following table summarizes the components of, and the changes in, Accumulated Other Comprehensive Loss (AOCL), net of tax (in thousands):
| Retirement Plans |  | Foreign Currency Translation |  | Available-For-Sale Investment |  | Total
Quarters ended: |  |  |  |  |  |  |
Balance at Dec. 31, 2022 | $ | (126,065) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (125,533) |
Amounts reclassified from AOCL | 1,078 |  |  | — |  |  | — |  |  | 1,078 |
Total other comprehensive income | 1,078 |  |  | — |  |  | — |  |  | 1,078 |
Balance at Mar. 31, 2023 | $ | (124,987) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (124,455) |
Balance at Dec. 31, 2021 | $ | (113,090) |  |  | $ | 455 |  |  | $ | 15,419 |  |  | $ | (97,216) |
Other comprehensive loss before reclassifications | — |  |  | 77 |  |  | — |  |  | 77 |
Amounts reclassified from AOCL | 724 |  |  | — |  |  | (15,419) |  |  | (14,695) |
Total other comprehensive income | 724 |  |  | 77 |  |  | (15,419) |  |  | (14,618) |
Balance at Mar. 31, 2022 | $ | (112,366) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (111,834) |
Schedule of Reclassification out of Accumulated Other Comprehensive Loss | Amounts reclassified out of AOCL are summarized below (in thousands):
| Quarter ended Mar. 31, |  |  |
| 2023 |  | 2022 |  |  |  |  |
Amortization of prior service credit, net | $ | (125) |  |  | $ | (125) |  |  |  |  |  |
Amortization of actuarial loss | 1,575 |  |  | 1,100 |  |  |  |  |  |
Realized gain on available-for-sale investment | — |  |  | (20,800) |  |  |  |  |  |
Total reclassifications, before tax | 1,450 |  |  | (19,825) |  |  |  |  |  |
Income tax effect | (372) |  |  | 5,130 |  |  |  |  |  |
Total reclassifications, net of tax | $ | 1,078 |  |  | $ | (14,695) |  |  |  |  |  |

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