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Pension Plans | 9 Months Ended
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Sep. 30, 2021
Pension Plans |
Pension Plans | 11. PENSION PLANS: Net periodic pension expense reflected in other gains and (losses), net in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Interest cost | ​ | $ | 534 | ​ | $ | 534 | ​ | $ | 1,484 | ​ | $ | 1,885 | ​
Expected return on plan assets | ​ |  | (1,103) | ​ |  | (962) | ​ |  | (3,150) | ​ |  | (3,071) | ​
Amortization of net actuarial loss | ​ |  | 217 | ​ |  | 340 | ​ |  | 801 | ​ |  | 903 | ​
Net settlement loss | ​ | ​ | 443 | ​ | ​ | 1,343 | ​ | ​ | 1,009 | ​ | ​ | 1,343 | ​
Total net periodic pension expense | ​ | $ | 91 | ​ | $ | 1,255 | ​ | $ | 144 | ​ | $ | 1,060 | ​
​ As a result of increased lump-sum distributions from the Company’s qualified retirement plan during 2021 and 2020, net settlement losses of $1.0 million and $1.3 million, respectively, were recognized in the nine months ended September 30, 2021 and 2020. ​ In addition, the increase in lump-sum distributions required the Company to re-measure its liability under its pension plan as of June 30, 2021. As a result of the re-measurement, as well as an increase in the pension plan’s assumed discount rate from 1.95% at December 31, 2020 to 2.31% at June 30, 2021, the Company recorded a $6.9 million decrease to its liability under the pension plan and a corresponding decrease in accumulated other comprehensive loss in the accompanying condensed consolidated balance sheet as of September 30, 2021.

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