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Retirement Plans
 6 Months Ended
Jun. 30, 2017
Retirement Plans [Abstract]  
Retirement Plans
5.
Retirement Plans

The Company’s components of annual benefit cost for the defined benefit plans for the periods presented are as follows:

  
Three Months Ended
June 30,
  
Six Months Ended
June 30,
 
(In thousands)
 
2017
  
2016
  
2017
  
2016
 
             
Service cost
 
$
465
  
$
503
  
$
926
  
$
1,006
 
Interest cost
  
359
   
425
   
714
   
845
 
Expected return on plan assets
  
(259
)
  
(300
)
  
(514
)
  
(597
)
Amortization of actuarial (gain) loss
  
(21
)
  
55
   
(42
)
  
108
 
Settlement expense
  
3,797
   
-
   
3,797
   
-
 
                 
Total defined benefit expense
 
$
4,341
  
$
683
  
$
4,881
  
$
1,362
 

During the three months ended June 30, 2017, one of the Company’s defined benefit plans was terminated. As a result, the pension benefit obligation was settled by making lump-sum cash payments to certain participants and also purchasing nonparticipating annuity contracts to cover the remaining vested benefits. As a result of this plan’s termination, the Company recognized $3.8 million of settlement expense during the three months ended June 30, 2017, which have been recorded in the Company’s restructuring and other costs. The plan was associated with two facilities which were closed under the Company’s 2014 Restructuring Plan.