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Postretirement Plans
3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Postretirement Plans
Postretirement Plans
The components of net periodic benefit cost were as follows:
  
Pension
 
Other Postretirement Benefits
Three months ended March 31
2015

 
2014

 
2015

 
2014

Service cost

$442

 

$414

 

$35

 

$32

Interest cost
747

 
784

 
62

 
72

Expected return on plan assets
(1,008
)
 
(1,041
)
 
(2
)
 
(2
)
Amortization of prior service costs/(credits)
49

 
45

 
(34
)
 
(36
)
Recognized net actuarial loss
396

 
261

 
4

 
2

Settlement/curtailment/other losses
38

 
338

 
2

 


Net periodic benefit cost

$664

 

$801

 

$67

 

$68

Net periodic benefit cost included in Earnings from operations

$785

 

$1,035

 

$92

 

$71