XML 25 R15.htm IDEA: XBRL DOCUMENT v3.8.0.1
Pension Plan
 9 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
Pension Plan
Pension Plan

Net periodic pension cost consists of the following: 

Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Service cost
$
151

 
$
113

 
$
452

 
$
339


 
 


 
 
 


Interest cost on projected benefit obligation
693

 
719

 
2,080

 
2,158


 
 


 
 
 


Expected return on plan assets
(1,325
)
 
(1,297
)
 
(3,975
)
 
(3,892
)

 
 


 
 
 


Net amortization and deferral
794

 
695

 
2,381

 
2,085


 
 


 
 
 


Net periodic pension cost
$
313

 
$
230

 
$
938

 
$
690


 
We do not expect to make any pension contributions during 2017.