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Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
Components of the net periodic benefit cost of the plan for the three and nine months ended September 30, 2017 and 2016 were as follows (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
2017
 
September 30,
2016
 
September 30,
2017
 
September 30,
2016
Service cost
$

 
$
102

 
$

 
$
307

Interest cost
21

 
83

 
62

 
249

Expected return on plan assets
(9
)
 
(74
)
 
(27
)
 
(223
)
Recognized net actuarial loss

 
21

 

 
63

Net periodic benefit cost
$
12

 
$
132

 
$
35

 
$
396