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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract] |
Employee Benefit Plans | Note 13 – Employee Benefit Plans Net periodic cost related to the Company’s unfunded supplemental benefit plans includes the following components:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
(in thousands) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Expense: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service costs |  | $ | 43 |  |  | $ | 44 |  |  | $ | 129 |  |  | $ | 134 |
Interest costs |  |  | 1,239 |  |  |  | 1,781 |  |  |  | 3,717 |  |  |  | 5,343 |
Amortization of net actuarial loss |  |  | 1,690 |  |  |  | 1,321 |  |  |  | 5,070 |  |  |  | 3,961 |
Amortization of prior service credit |  |  | (326 | ) |  |  | (777 | ) |  |  | (978 | ) |  |  | (2,331 | )
|  | $ | 2,646 |  |  | $ | 2,369 |  |  | $ | 7,938 |  |  | $ | 7,107 |
The Company contributed $10.8 million to its unfunded supplemental benefit plans during the nine months ended September 30, 2021 and expects to contribute an additional $4.6 million during the remainder of 2021.

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