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Employee Benefits
 3 Months Ended
Mar. 31, 2024
Employee Benefits [Abstract]  
Employee Benefits
Note 12.  Employee Benefits

We provide certain medical and dental care benefits to 13 former U.S. union employees.  The postretirement medical and dental benefit obligation to the former union employees as of March 31, 2024, and the related net periodic benefit cost for the plan for the three months ended March 31, 2024 and 2023 were not material.

We maintain a defined contribution Supplemental Executive Retirement Plan for key employees.  Under the plan, these employees may elect to defer a portion of their compensation and, in addition, we may at our discretion make contributions to the plan on behalf of the employees.  In March 2024, we made company contributions to the plan of $0.5 million related to calendar year 2023.

We also have an Employee Stock Ownership Plan and Trust for employees who are not covered by a collective bargaining agreement.  In connection therewith, we maintain an employee benefits trust to which we contribute shares of treasury stock.  We are authorized to instruct the trustees to distribute such shares toward the satisfaction of our future obligations under the plan. The shares held in trust are not considered outstanding for purposes of calculating earnings per share until they are committed to be released.  The trustees will vote the shares in accordance with their fiduciary duties.  During the three months ended March 31, 2024, we contributed to the trust an additional 68,700 shares from our treasury and released 68,700 shares from the trust leaving 200 shares remaining in the trust as of March 31, 2024.