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RETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2022
RETIREMENT PLANS  
Schedule of components of the plan's net periodic pension cost

Three months ended

March 31, 2022

    

March 31, 2021

Pension benefits

Postretirement benefits

Pension benefits

Postretirement benefits

Operating expense

Service cost

$

57

$

36

$

54

$

35

Non-operating expense

Interest cost

565

33

572

41

Expected return on plan assets

 

(925)

 

(687)

 

Actuarial (gain)/ loss

Net periodic pension expense (benefit)

$

(303)

$

69

$

(61)

$

76