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Pension Plan
 3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Pension Plan Pension Plan

Net periodic pension cost consists of the following: 

Three Months Ended March 31,
 
2019
 
2018
Service cost
$
253

 
$
169


 
 


Interest cost on projected benefit obligation
782

 
701


 
 


Expected return on plan assets
(1,181
)
 
(1,354
)

 
 


Net amortization and deferral
720

 
672


 
 


Net periodic pension cost
$
574

 
$
188


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