XML 45 R30.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Retirement Plans (Table)
3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
The following tables provide information about the Pension Plan:

Pension Plan
Quarter ended March 31,
($ in thousands)20242023
Net Periodic Pension Cost (Benefit):
Interest cost$3,888 3,866 
Expected return on plan assets(5,382)(5,773)
Amortization of unrecognized net actuarial loss955 751 
Total net periodic pension cost (benefit)1
$(539)(1,156)
1The components of net periodic pension cost (benefit) are included within "Loss and loss expense incurred" and "Other insurance expenses" on the Consolidated Statements of Income.
Schedule of Weighted-Average Expense Assumptions
Pension Plan
Quarter ended March 31,
20242023
Weighted-Average Expense Assumptions:
Discount rate5.02 %5.21 %
Effective interest rate for calculation of interest cost4.91 5.09 
Expected return on plan assets6.40 6.90