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Defined Benefit Plans | 6 Months Ended
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Jun. 30, 2021
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract] |
Defined Benefit Plans |
(11) | Defined Benefit Plans
Mid Penn has an unfunded noncontributory defined benefit retirement plan for directors. The plan provides defined benefits based on years of service. Mid Penn also sponsors a defined benefit healthcare plan that provides post-retirement medical benefits and life insurance to qualifying full-time employees. These healthcare and life insurance plans are noncontributory and each plan uses a December 31 measurement date. As a result of the acquisition of Scottdale on January 8, 2018, Mid Penn assumed a noncontributory defined benefit pension plan covering certain former employees of Scottdale. Mid Penn contributed $285,000 to the defined benefit plan during the second quarter of 2021, and no additional contributions are expected through the remainder of 2021. A December 31 measurement date for the plan is used. The components of net periodic benefit costs from these defined benefit plans are as follows:
| Three Months Ended June 30, |
(Dollars in thousands) | Pension Benefits |  |  | Other Benefits |
| 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Service cost | $ | 33 |  |  | $ | 45 |  |  | $ | — |  |  | $ | 1 |
Interest cost |  | 40 |  |  |  | 60 |  |  |  | 2 |  |  |  | 6 |
Expected return on plan assets |  | (57 | ) |  |  | (68 | ) |  |  | — |  |  |  | — |
Accretion of prior service cost |  | — |  |  |  | — |  |  |  | (5 | ) |  |  | (5 | )
Amortization of net loss |  | — |  |  |  | — |  |  |  | 4 |  |  |  | — |
Settlement loss |  | — |  |  |  | 22 |  |  |  | — |  |  |  | — |
Net periodic benefit expense | $ | 16 |  |  | $ | 59 |  |  | $ | 1 |  |  | $ | 2 |
| Six Months Ended June 30, |
(Dollars in thousands) | Pension Benefits |  |  | Other Benefits |
| 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Service cost | $ | 65 |  |  | $ | 64 |  |  | $ | 1 |  |  | $ | 1 |
Interest cost |  | 80 |  |  |  | 105 |  |  |  | 4 |  |  |  | 6 |
Expected return on plan assets |  | (113 | ) |  |  | (136 | ) |  |  | — |  |  |  | — |
Accretion of prior service cost |  | — |  |  |  | — |  |  |  | (10 | ) |  |  | (10 | )
Amortization of net loss |  | — |  |  |  | — |  |  |  | 4 |  |  |  | — |
Settlement (gain) loss |  | (49 | ) |  |  | 22 |  |  |  | — |  |  |  | — |
Net periodic benefit (income) expense | $ | (17 | ) |  | $ | 55 |  |  | $ | (1 | ) |  | $ | (3 | )
Service costs are reported as a component of salaries and employee benefits on the Consolidated Statements of Income, while interest costs, expected return on plan assets and amortization (accretion) of prior service cost are reported as a component of other income.

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