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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2021
Employee Benefit Plans  
Schedule of net periodic benefit cost

The net periodic benefit cost was as follows (in thousands):

Three Months Ended

March 31,

    

2021

2020

    

Service cost

 

$

1,955

$

1,457

 

Interest cost

 

22

46

 

Expected return on plan assets

 

(15)

(30)

 

Amortization of prior service cost

 

54

54

 

Amortization of actuarial losses

288

167

Net periodic benefit cost

 

$

2,304

$

1,694