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Employee benefit plans (Tables)
3 Months Ended
Mar. 31, 2021
Employee benefit plans  
Summary of the components of net periodic benefit cost

Three Months Ended March 31, 

2021

2020

Interest cost

$

3

$

4

Expected return on plan assets

(7)

(6)

Amortization of net loss

1

Expenses paid

1

1

Net periodic benefit cost

$

(2)

$

(1)