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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2014
Benefit Plans [Abstract]  
Components of net periodic benefit cost
The following table provides the components of net periodic benefit cost for the pension, supplemental executive retirement and other postretirement benefit plans:
 
 Three Months Ended March 31,
 
Pension and Supplemental
Other Postretirement
 
Executive Retirement Plans
Benefits
 
2014
2013
2014
2013
 
(In thousands)
 
Service cost
 
$
2,080
  
$
2,717
  
$
177
  
$
194
 
Interest cost
  
4,009
   
3,799
   
183
   
154
 
Expected return on plan assets
  
(5,258
)
  
(5,038
)
  
(1,161
)
  
(920
)
Recognized net actuarial loss
  
291
   
1,516
   
(73
)
  
-
 
Amortization of prior service cost
  
(42
)
  
125
   
(1,662
)
  
(1,663
)
 
                
Net periodic benefit cost
 
$
1,080
  
$
3,119
  
$
(2,536
)
 
$
(2,235
)