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Postretirement Plans
 6 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Postretirement Plans
Postretirement Plans
The components of net periodic benefit cost were as follows:
 
Six months ended June 30
 
Three months ended June 30
Pension Plans
2014

 
2013

 
2014

 
2013

Service cost

$829

 

$946

 

$415

 

$473

Interest cost
1,542

 
1,462

 
758

 
731

Expected return on plan assets
(2,083
)
 
(1,938
)
 
(1,042
)
 
(969
)
Amortization of prior service costs
89

 
98

 
44

 
49

Recognized net actuarial loss
514

 
1,138

 
253

 
569

Settlement/curtailment/other losses
337

 
20

 
(1
)
 


Net periodic benefit cost

$1,228

 

$1,726

 

$427

 

$853

Net periodic benefit cost included in Earnings from operations

$1,728

 

$1,544

 

$693

 

$753


 
Six months ended June 30
 
Three months ended June 30
Other Postretirement Benefit Plans
2014

 
2013

 
2014

 
2013

Service cost

$64

 

$74

 

$32

 

$37

Interest cost
144

 
133

 
72

 
66

Expected return on plan assets
(4
)
 
(4
)
 
(2
)
 
(2
)
Amortization of prior service costs
(72
)
 
(90
)
 
(36
)
 
(45
)
Recognized net actuarial loss
4

 
48

 
2

 
24

Net periodic benefit cost

$136

 

$161

 

$68

 

$80

Net periodic benefit cost included in Earnings from operations

$143

 

$179

 

$72

 

$88


In the first quarter of 2014, we announced changes to our nonunion and certain union retirement plans whereby approximately 100,000 employees will transition in 2016 to a company-funded defined contribution retirement savings plan in lieu of participation in defined benefit pension plans. The defined benefit pension plan changes resulted in charges of $334 in the first quarter of 2014, primarily for pension curtailment costs. In addition, we remeasured pension assets and benefit obligations for the affected pension plans. These remeasurements resulted in a net actuarial gain of $966 which is included in Other Comprehensive Income. The $966 reflects a gain of $1,988 resulting from benefit plan changes that was partially offset by net actuarial losses of $1,022 primarily driven by a reduction in the discount rate from approximately 4.8% at December 31, 2013 to approximately 4.5% as of the remeasurement dates.