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COMPONENTS OF PENSION AND OTHER POST-EMPLOYMENT BENEFIT (OPEB) PLANS NET PERIODIC BENEFIT COSTS
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
COMPONENTS OF PENSION AND OTHER POST-EMPLOYMENT BENEFIT (OPEB) PLANS NET PERIODIC BENEFIT COSTS COMPONENTS OF PENSION AND OTHER POST-EMPLOYMENT BENEFIT (OPEB) PLANS NET PERIODIC BENEFIT COSTS:

The components of Net Periodic Benefit (Credit) Cost are as follows:
 
Pension Benefits
 
Other Post-Employment Benefits
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
Service Cost
$
987

 
$
288

 
$
2,963

 
$
863

 
$
—

 
$
—

 
$
—

 
$
—

Interest Cost
6,275

 
5,876

 
18,825

 
17,628

 
4,580

 
4,677

 
13,740

 
14,030

Expected Return on Plan Assets
(10,114
)
 
(10,092
)
 
(30,343
)
 
(30,277
)
 
—

 
—

 
—

 
—

Amortization of Prior Service Credits
(92
)
 
(126
)
 
(275
)
 
(377
)
 
(601
)
 
(601
)
 
(1,804
)
 
(1,804
)
Amortization of Actuarial Loss
1,490

 
2,179

 
4,469

 
6,537

 
2,315

 
4,051

 
6,946

 
12,154

Net Periodic Benefit (Credit) Cost
$
(1,454
)
 
$
(1,875
)
 
$
(4,361
)
 
$
(5,626
)
 
$
6,294

 
$
8,127

 
$
18,882

 
$
24,380



Expenses (credits) related to pension and other post-employment benefits are reflected in Operating and Other Costs in the Consolidated Statements of Income.