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Retirement Plans and Other Benefits (Tables)
 3 Months Ended
Mar. 31, 2012
Retirement Plans and Other Benefits  
Net periodic benefit costs and the portion of these costs charged to expense

 

 

 

 

Pension Benefits

 

Other Benefits

 

 

 

Three Months Ended
March 31,

 

Three Months Ended
March 31,

 

 

 

2012

 

2011

 

2012

 

2011

 

Service cost - benefits earned during the period

 

$

16

 

$

16

 

$

7

 

$

6

 

Interest cost on benefit obligation

 

30

 

31

 

12

 

12

 

Expected return on plan assets

 

(35

)

(33

)

(11

)

(10

)

Amortization of net actuarial loss

 

11

 

6

 

6

 

3

 

Net periodic benefit cost

 

$

22

 

$

20

 

$

14

 

$

11

 

Portion of cost charged to expense

 

$

6

 

$

8

 

$

3

 

$

4