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Postretirement Plans
6 Months Ended
Jun. 30, 2012
General Discussion of Pension and Other Postretirement Benefits [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
2012


2011


2012

 
2011

Service cost

$822



$702

 

$411

 

$350

Interest cost
1,502


1,559

 
751

 
780

Expected return on plan assets
(1,916
)

(1,870
)
 
(958
)
 
(935
)
Amortization of prior service costs
112


121

 
56

 
59

Recognized net actuarial loss
968


628

 
484

 
314

Settlement and curtailment loss
10


55

 
3

 
11

Net periodic benefit cost

$1,498

 

$1,195

 

$747

 

$579

Net periodic benefit cost included in Earnings from operations

$1,248

 

$915

 

$593

 

$389


 
Six months ended
June 30
 
Three months ended
June 30
Other Postretirement Benefit Plans
2012

 
2011

 
2012

 
2011

Service cost

$72

 

$72

 

$36

 

$36

Interest cost
158

 
206

 
79

 
103

Expected return on plan assets
(4
)
 
(2
)
 
(2
)
 
(1
)
Amortization of prior service costs
(98
)
 
(48
)
 
(49
)
 
(24
)
Recognized net actuarial loss
60

 
66

 
30

 
33

Settlement and curtailment loss
(2
)
 


 

 

Net periodic benefit cost

$186

 

$294

 

$94

 

$147

Net periodic benefit cost included in Earnings from operations

$282

 

$280

 

$133

 

$118


A portion of net periodic benefit cost is allocated to production as product costs and may remain in inventory at the end of the reporting period.
During the six months ended June 30, 2012 and 2011, we made discretionary pension contributions of $763 and $0. During the six months ended June 30, 2012 and 2011, we made contributions to our other postretirement benefit plans of $8 in both periods.