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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Schedule of Defined Benefit Plans Disclosures
Benefit plan obligations: The Benefit Plan Obligations caption includes the following:
($ in thousands)December 31, 2023December 31, 2022
Postretirement medical benefits plan$1,653 $1,869 
Supplemental executive retirement plan2,290 1,889 
Total$3,943 $3,758