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Note 4 - Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2023
Disclosure Text Block [Abstract] |
Retirement Benefits [Text Block] | Note 4. Employee Benefit Plans We sponsor three defined benefit pension plans, two of which cover substantially all U.S. employees. Net periodic pension (benefit) cost for the plans consisted of the following for the three and nine months ended September 30, 2023 and 2022 (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Service cost |  | $ | 949 |  |  | $ | 1,566 |  |  | $ | 2,847 |  |  | $ | 4,697 |
Interest cost |  |  | 1,993 |  |  |  | 1,369 |  |  |  | 5,979 |  |  |  | 4,107 |
Expected return on plan assets |  |  | (3,107 | ) |  |  | (3,363 | ) |  |  | (9,321 | ) |  |  | (10,089 | )
Amortization of prior service cost |  |  | 125 |  |  |  | 128 |  |  |  | 375 |  |  |  | 384 |
Amortization of net loss |  |  | (47 | ) |  |  | 512 |  |  |  | (141 | ) |  |  | 1,537 |
Net periodic pension (benefit) cost |  | $ | (87 | ) |  | $ | 212 |  |  | $ | (261 | ) |  | $ | 636 |
For the three and nine months ended September 30, 2023 and 2022, the service cost component of net periodic pension cost is included in the same line items of our condensed consolidated financial statements as other employee compensation costs. The net benefit related to all other components of net periodic pension cost of $1.0 million and $3.1 million for the three and nine months ended September 30, 2023, respectively, and $1.4 million and $4.1 million for the three and nine months ended September 30, 2022, respectively, is included in other income on our condensed consolidated statements of operations and comprehensive loss.

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