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Employee Benefit Plans | 3 Months Ended
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Mar. 31, 2021
Employee Benefit Plans |
Employee Benefit Plans | (10) Employee Benefit Plans Employee Benefits Employee benefits charged to operating expenses are summarized in the table below for the periods indicated. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
(in thousands) |  | 2021 |  | 2020
Payroll taxes | ​ | $ | 435 | ​ | $ | 389
Medical plans | ​ |  | 450 | ​ |  | 427
401(k) match and profit sharing | ​ | ​ | 499 | ​ | ​ | 306
Periodic pension cost | ​ |  | 416 | ​ |  | 464
Other | ​ |  | 4 | ​ |  | 23
Total employee benefits | ​ | $ | 1,804 | ​ | $ | 1,609
​ The Company’s profit-sharing plan includes a matching 401(k) portion, in which the Company matches the first 3% of eligible employee contributions. The Company makes annual contributions in an amount up to 6% of income before income taxes and before contributions to the profit-sharing and pension plans for all participants, limited to the maximum amount deductible for federal income tax purposes, for each of the periods shown. Other Plans On November 7, 2018, the Board of Directors of the Company adopted a supplemental executive retirement plan (SERP) which became effective on January 1, 2018. The SERP provides select employees who satisfy certain eligibility requirements with certain benefits upon retirement, termination of employment or death. As of March 31, 2021, the accrued liability was $1.1 million and the expense for the three months ended March 31, 2021 and 2020 was $97,000 and $80,000, respectively, and is recognized over the required service period. Pension The Company provides a noncontributory defined benefit pension plan for all full-time eligible employees. Beginning January 1, 2018 and for all retrospective periods presented, the Company adopted the guidance under ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. Under the new guidance, only the service cost component of the net periodic benefit cost is reported in the same income statement line item as salaries and benefits, and the remaining components are reported as other non-interest expense. An employer is required to recognize the funded status of a defined benefit postretirement plan as an asset or liability in its balance sheet and to recognize changes in that funded status in the year in which the changes occur through comprehensive income. Under the Company’s funding policy for the defined benefit pension plan, contributions are made to a trust as necessary to provide for current service and for any unfunded accrued actuarial liabilities over a reasonable period. To the extent that these requirements are fully covered by assets in the trust, a contribution might not be made in a particular year. The Company made a pension contribution of $1.0 million on March 22, 2021. Effective July 1, 2017, the Company amended the pension plan to effectuate a “soft freeze” such that no individual hired (or rehired in the case of a former employee) by the Company after September 30, 2017, whether or not such individual is or was a vested member in the plan, will be eligible to be an active member and be entitled to accrue any benefits under the plan. Components of Net Pension Cost and Other Amounts Recognized in Accumulated Other Comprehensive Income The following items are components of net pension cost for the periods indicated: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension Benefits | ​
(in thousands) |  | 2021 |  | 2020 | ​
Service cost - benefits earned during the year | ​ | $ | 1,663 | ​ | $ | 1,857 | ​
Interest costs on projected benefit obligations (a) | ​ |  | 1,023 | ​ |  | 1,159 | ​
Expected return on plan assets (a) | ​ |  | (1,825) | ​ |  | (1,572) | ​
Expected administrative expenses (a) | ​ |  | 104 | ​ |  | 110 | ​
Amortization of prior service cost (a) | ​ |  | — | ​ |  | 50 | ​
Amortization of unrecognized net loss (a) | ​ |  | 181 | ​ |  | 218 | ​
Net periodic pension cost | ​ | $ | 1,146 | ​ | $ | 1,822 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(a) | The components of net periodic pension cost other than the service cost component are included in other non-interest expense.
Net periodic pension benefit costs include interest costs based on an assumed discount rate, the expected return on plan assets based on actuarially derived market-related values, and the amortization of net actuarial losses. Net periodic postretirement benefit costs include service costs, interest costs based on an assumed discount rate, and the amortization of prior service credits and net actuarial gains. Differences between expected and actual results in each year are included in the net actuarial gain or loss amount, which is recognized in other comprehensive income. The net actuarial gain or loss in excess of a 10% corridor is amortized in net periodic benefit cost over the average remaining service period of active participants in the Plans. The prior service credit is amortized over the average remaining service period to full eligibility for participating employees expected to receive benefits.

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