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Benefit Plans
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
Table 10.1 provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three months ended March 31, 2020 and 2019.
Components of net periodic benefit cost
Table
10.1
 
 
 
 
 
 
 
 
 
 
Three Months Ended March 31,
 
 
Pension and Supplemental Executive Retirement Plans
 
Other Postretirement Benefit Plans
(In thousands)
 
2020
 
2019
 
2020
 
2019
Service cost
 
$
1,821

 
$
1,996

 
$
309

 
$
312

Interest cost
 
3,414

 
3,955

 
214

 
291

Expected return on plan assets
 
(5,580
)
 
(4,908
)
 
(1,852
)
 
(1,445
)
Amortization of net actuarial losses/(gains)
 
1,634

 
2,167

 
(190
)
 
—

Amortization of prior service cost/(credit)
 
(62
)
 
(70
)
 
13

 
(8
)
Net periodic benefit cost (benefit)
 
$
1,227

 
$
3,140

 
$
(1,506
)
 
$
(850
)

We currently intend to make contributions totaling $12.5 million to our qualified pension plan and supplemental executive retirement plan in 2020.