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Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost
Components of the net periodic benefit cost of the plan for the three and six months ended June 30, 2017 and 2016 were as follows (in thousands):
 
Three Months Ended
 
Six Months Ended
 
June 30,
2017
 
June 30,
2016
 
June 30,
2017
 
June 30,
2016
Service cost
$

 
$
103

 
$

 
$
205

Interest cost
20

 
83

 
41

 
166

Expected return on plan assets
(9
)
 
(75
)
 
(18
)
 
(149
)
Recognized net actuarial loss

 
21

 

 
42

Net periodic benefit cost
$
11

 
$
132

 
$
23

 
$
264