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EMPLOYEE BENEFIT PLANS | 3 Months Ended
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Mar. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
EMPLOYEE BENEFIT PLANS | EMPLOYEE BENEFIT PLANS We have one qualified non-contributory defined benefit pension plan covering a portion of our employees and an unfunded plan that provides benefits in excess of amounts allowable under current tax law in the qualified plan. Both plans are closed to new participants. Effective December 31, 2016, we froze benefits for all employees participating in the pension plan. In lieu of the pension plan, we provide those employees with an enhanced 401(k) plan match. Employee benefit plan liabilities are calculated using actuarial estimates and management assumptions. These estimates are based on historical information, along with certain assumptions about future events. Changes in assumptions, as well as changes in actual experience, could cause the estimates to change. We are not required to make mandatory 2021 pension contributions due to our plan’s improved funding status and have made no pension contribution payments during the three months ended March 31, 2021. The net pension and postretirement benefit (credits) costs that have been recorded are shown in the following table:
Components of Net Periodic Benefit (Credit) Cost | Income Statement Location |  | Pension |  | Postretirement
| Three Months Ended March 31, |  | Three Months Ended March 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | Selling and general expenses |  | — |  |  | — |  |  | $2 |  |  | $2 |
Interest cost | Interest and other miscellaneous expense, net |  | 557 |  |  | 677 |  |  | 11 |  |  | 13 |
Expected return on plan assets (a) | Interest and other miscellaneous expense, net |  | (936) |  |  | (876) |  |  | — |  |  | — |
Amortization of losses | Interest and other miscellaneous expense, net |  | 288 |  |  | 215 |  |  | 5 |  |  | 2 |
Net periodic benefit (credit) cost |  |  | ($91) |  |  | $16 |  |  | $18 |  |  | $17 |
(a)The weighted-average expected long-term rate of return on plan assets used in computing 2021 net periodic benefit cost for pension benefit s i s 5.7%.

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