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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The net periodic pension cost for the Pension Plan consisted of the following components:

Three months ended March 31
 20252024
 (dollars in thousands)
Interest cost$768 $790 
Expected return on plan assets(978)(976)
Net periodic pension cost$(210)$(186)

The components of the net benefit for the Postretirement Plan consisted of the following components:

Three months ended March 31
 20252024
 (dollars in thousands)
Interest cost$9 $10 
Net accretion and deferral(136)(136)
Net periodic benefit$(127)$(126)