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Accumulated other comprehensive loss (Tables) | 6 Months Ended
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Jun. 30, 2022
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 Mar. 31, 2022 | $ | (112,366) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (111,834) |
Amounts reclassified from AOCL | 806 |  |  | — |  |  | — |  |  | 806 |
Total other comprehensive income | 806 |  |  | — |  |  | — |  |  | 806 |
Balance at June 30, 2022 | $ | (111,560) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (111,028) |
Balance at Mar. 31, 2021 | $ | (120,070) |  |  | $ | 272 |  |  | $ | — |  |  | $ | (119,798) |
Other comprehensive loss before reclassifications | — |  |  | 189 |  |  | — |  |  | 189 |
Amounts reclassified from AOCL | 1,005 |  |  | — |  |  | — |  |  | 1,005 |
Total other comprehensive income | 1,005 |  |  | 189 |  |  | — |  |  | 1,194 |
Balance at June 30, 2021 | $ | (119,065) |  |  | $ | 461 |  |  | $ | — |  |  | $ | (118,604) |
| Retirement Plans |  | Foreign Currency Translation |  | Available-For-Sale Investment |  | Total
Six Months Ended: |  |  |  |  |  |  |
Balance at Dec. 31, 2021 | $ | (113,090) |  |  | $ | 455 |  |  | $ | 15,419 |  |  | $ | (97,216) |
Other comprehensive income before reclassifications | — |  |  | 77 |  |  | — |  |  | 77 |
Amounts reclassified from AOCL | 1,530 |  |  | — |  |  | (15,419) |  |  | (13,889) |
Total other comprehensive income (loss) | 1,530 |  |  | 77 |  |  | (15,419) |  |  | (13,812) |
Balance at June 30, 2022 | $ | (111,560) |  |  | $ | 532 |  |  | $ | — |  |  | $ | (111,028) |
Balance at Dec. 31, 2020 | $ | (120,979) |  |  | $ | (97) |  |  | $ | — |  |  | $ | (121,076) |
Other comprehensive income before reclassifications | — |  |  | 558 |  |  | — |  |  | 558 |
Amounts reclassified from AOCL | 1,914 |  |  | — |  |  | — |  |  | 1,914 |
Total other comprehensive income | 1,914 |  |  | 558 |  |  | — |  |  | 2,472 |
Balance at June 30, 2021 | $ | (119,065) |  |  | $ | 461 |  |  | $ | — |  |  | $ | (118,604) |
Schedule of Reclassification out of Accumulated Other Comprehensive Loss | Amounts reclassified out of AOCL are summarized below (in thousands):
| Quarter ended June 30, |  | Six months ended June 30, |
| 2022 |  | 2021 |  | 2022 |  | 2021 |
Amortization of prior service credit, net | $ | (123) |  |  | $ | (266) |  |  | $ | (248) |  |  | $ | (241) |  |
Amortization of actuarial loss | 1,208 |  |  | 1,619 |  |  | 2,309 |  |  | 2,819 |  |
Realized gain on available-for-sale investment | — |  |  | — |  |  | (20,800) |  |  | — |  |
Total reclassifications, before tax | 1,085 |  |  | 1,353 |  |  | (18,739) |  |  | 2,578 |  |
Income tax effect | (279) |  |  | (348) |  |  | 4,850 |  |  | (664) |  |
Total reclassifications, net of tax | $ | 806 |  |  | $ | 1,005 |  |  | $ | (13,889) |  |  | $ | 1,914 |  |

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