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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Components of employee benefit plan expense
The components of the employee benefit plan expense consisted of the following:
 Three Months Ended 
June 30,		Six Months Ended 
June 30,
(in thousands)2024202320242023
Interest cost$5,603 $5,935 $11,205 $11,870 
Expected return on plan assets, net of expenses(6,018)(6,307)(12,036)(12,613)
Amortization of actuarial loss and prior service cost4 4 9 9 
Total for defined benefit pension plan(411)(368)(822)(734)
SERPs234 234 468 466 
Defined contribution plan3,438 4,166 8,941 8,595 
Net periodic benefit cost$3,261 $4,032 $8,587 $8,327