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Employee benefit plans (Tables)
9 Months Ended
Sep. 30, 2022
Employee benefit plans  
Schedule of components of net periodic benefit cost

Pension Benefits

Three Months Ended September 30, 

    

2022

    

2021

Components of net periodic pension benefit:

    

    

Interest cost

$

114

$

105

Expected return on plan assets

 

(352)

 

(322)

Amortization of unrecognized net gain

 

50

 

76

Net periodic benefit

$

(188)

$

(141)

Pension Benefits

Nine Months Ended September 30, 

    

2022

    

2021

Components of net periodic pension benefit:

    

    

Interest cost

$

342

$

315

Expected return on plan assets

 

(1,056)

 

(966)

Amortization of unrecognized net gain

 

149

 

227

Net periodic benefit

$

(565)

$

(424)