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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
Components of employee benefit plan expense
The components of the employee benefit plan expense consisted of the following:
 Three Months Ended 
September 30,
Nine Months Ended 
September 30,
(in thousands)2022202120222021
Interest cost$4,333 $4,143 $12,999 $12,349 
Expected return on plan assets, net of expenses(6,227)(5,786)(18,675)(17,426)
Amortization of actuarial loss and prior service cost997 1,684 3,026 4,657 
Total for defined benefit pension plan(897)41 (2,650)(420)
SERPs214 223 642 670 
Defined contribution plan3,258 3,197 11,582 10,877 
Net periodic benefit cost$2,575 $3,461 $9,574 $11,127