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Employee benefit plans (Tables)
9 Months Ended
Sep. 30, 2017
Employee benefit plans  
Schedule of components of net periodic benefit cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pension Benefits

 

Three Months Ended September 30, 

    

2017

    

2016

    

Components of net periodic pension cost:

    

 

 

    

 

 

 

Interest cost

 

$

217

 

$

166

 

Expected return on plan assets

 

 

(305)

 

 

(223)

 

Amortization of unrecognized net gain

 

 

65

 

 

52

 

Net periodic other benefit cost

 

$

(23)

 

$

(5)

 

 

 

 

 

 

Pension Benefits

Nine Months Ended September 30, 

    

2017

    

2016

    

Components of net periodic pension cost:

    

 

 

    

 

 

 

Interest cost

 

$

433

 

$

499

 

Expected return on plan assets

 

 

(610)

 

 

(670)

 

Amortization of unrecognized net gain

 

 

130

 

 

156

 

Net periodic other benefit cost

 

$

(47)

 

$

(15)