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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Income for the Pension Plans
Net periodic benefit income from our pension plans included the following components for the three months ended March 31,:
Pension Benefits
(in thousands)20232022
Service cost$1,494 $2,616 
Interest cost26,117 18,867 
Expected return on plan assets(41,240)(37,672)
Amortization of prior service cost173 172 
Amortization of actuarial loss2,341 9,279 
Net periodic benefit income$(11,115)$(6,738)