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Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs
The components of net periodic benefit cost are as follows:
 
Pension Benefits
 
Three Months Ended March 31,
(In thousands)
2016
 
2015
Service cost
$
198

 
$
207

Interest cost
3,649

 
3,517

Expected return on assets
(3,788
)
 
(3,902
)
Amortization of unrecognized prior service costs
75

 
570

Amortization of actuarial losses/(gains)
830

 
1,057

Net periodic pension cost
$
964

 
$
1,449

 
 
 
 

 
Postretirement Benefits
 
Three Months Ended March 31,
(In thousands)
2016
 
2015
Service cost
$
26

 
$
41

Interest cost
64

 
144

Amortization of unrecognized prior service costs
(636
)
 
(160
)
Amortization of actuarial losses/(gains)
245

 
81

Net periodic postretirement cost
$
(301
)
 
$
106