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Employee Pension Plans (Tables)
3 Months Ended
Mar. 31, 2021
Retirement Benefits [Abstract]  
Summary of Net Periodic Benefit Cost
The following table sets forth a summary of the net periodic benefit cost for the three months ended March 31, 2021 and 2020:
Three Months Ended March 31,
(in thousands)20212020
Interest cost$582 $758 
Service cost236 231 
Expected return on plan assets(1,015)(1,006)
Recognized net actuarial losses683 592 
Net periodic benefit cost$486 $575