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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2024
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 September 30Nine months ended September 30
 2024202320242023
 (dollars in thousands)
Interest cost$790 $856 $2,369 $2,567 
Expected return on plan assets(976)(878)(2,927)(2,632)
Net amortization and deferral— 81 — 242 
Net periodic pension cost$(186)$59 $(558)$177 

The components of the net benefit for the Postretirement Plan consisted of the following components:
Three months ended September 30Nine months ended September 30
 2024202320242023
 (dollars in thousands)
Interest cost$10 $12 $29 $38 
Net accretion and deferral(135)(137)(406)(409)
Net periodic benefit$(125)$(125)$(377)$(371)