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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 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 June 30Six months ended June 30
 2024202320242023
 (dollars in thousands)
Interest cost$789 $855 $1,579 $1,711 
Expected return on plan assets(975)(877)(1,951)(1,754)
Net amortization and deferral— 80 — 161 
Net periodic pension cost$(186)$58 $(372)$118 

The components of the net benefit for the Postretirement Plan consisted of the following components:
Three months ended June 30Six months ended June 30
 2024202320242023
 (dollars in thousands)
Interest cost$9 $13 $19 $26 
Net accretion and deferral(136)(136)(271)(272)
Net periodic benefit$(127)$(123)$(252)$(246)