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Pension Plan
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Pension Plan Pension Plan

Net periodic pension cost consists of the following: 

Three Months Ended March 31,
 
2020
 
2019
Service cost
$
179

 
$
253


 
 


Interest cost on projected benefit obligation
639

 
782


 
 


Expected return on plan assets
(1,255
)
 
(1,181
)

 
 


Net amortization and deferral
705

 
720


 
 


Net periodic pension cost
$
268

 
$
574


 
We do not expect to make any pension contributions during 2020. Non-service cost of $0.1 million and $0.3 million are included in other expense in the consolidated condensed statements of comprehensive income for the three months ended March 31, 2020 and 2019, respectively.