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BENEFIT PLANS (Tables)
3 Months Ended
Mar. 31, 2021
BENEFIT PLANS  
Schedule of net periodic benefit cost

The net periodic benefit cost for the three  months ended March 31, 2021 and 2020 is as follows:

Pension Benefits

Post-retirement Benefits

Three Months Ended

Three Months Ended

March 31, 

March 31, 

(000’s omitted)

2021

    

2020

    

2021

    

2020

    

Service cost

$

1,480

$

1,438

$

0

$

0

Interest cost

 

1,259

    

 

1,356

    

 

11

    

14

 

Expected return on plan assets

 

(4,696)

 

(3,932)

 

0

 

0

Amortization of unrecognized net loss

 

900

 

810

 

11

 

10

Amortization of prior service cost

 

95

 

60

 

(45)

 

(45)

Net periodic benefit

$

(962)

$

(268)

$

(23)

$

(21)