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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Components of benefit 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)2022202120222021
Interest cost$4,333 $4,103 $8,666 $8,206 
Expected return on plan assets, net of expenses(6,224)(5,820)(12,448)(11,640)
Amortization of actuarial loss and prior service cost1,015 1,486 2,029 2,973 
Total for defined benefit pension plan(876)(231)(1,753)(461)
SERPs214 224 428 447 
Defined contribution plan3,871 3,702 8,324 7,680 
Net periodic benefit cost$3,209 $3,695 $6,999 $7,666