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Retirement Plans, Postretirement And Postemployment Benefits (Tables)
12 Months Ended
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Accumulated Benefit Obligations In Excess Of Plan Assets

  (add 000)

   2011      2010  

  Projected benefit obligation

   $ 456,365       $ 397,985   

  Accumulated benefit obligation

   $ 417,179       $ 366,234   

  Fair value of plan assets

   $ 324,485       $ 311,061   
Schedule Of Weighted-Average Assumptions
Schedule Of Target Assets Allocation
     Percentage of Plan Assets  
           December 31  

  Asset Class

  

2011

Target

Allocation

    2011     2010  

  Equity securities

     56     57     54

Debt securities

     34     34     41

Hedge funds

     5     4     4

Real estate

     5     5     --   

Cash

     --        --        1
   

Total

     100     100     100
   
Schedule Of Fair Values Of Pension Plan Assets By Asset Class And Fair Value Hierarchy Level

December 31

  

Quoted Prices
in Active
Markets

for Identical
Assets

(Level 1)

  

Significant
Observable
Inputs

(Level 2)

  

Significant
Unobservable
Inputs

(Level 3)

   Total Fair
Value

(add 000)

   2011

Equity securities:

                   

Mid-sized to large cap

     $ --        $ 133,512        $ --        $ 133,512  

International and
emerging growth
funds

       --          50,518          --          50,518  

Debt securities:

                   

Core fixed income

       --          94,745          --          94,745  

High-yield bonds

       --          17,096          --          17,096  

Real estate

       --          15,841          --          15,841  

Hedge funds

       --          --          12,979          12,979  

Cash

       459          --          --          459  

Total

     $         459        $ 311,712        $ 12,979        $ 325,150  
2010

Equity securities:

                   

Mid-sized to large cap

     $ --        $ 121,596        $ --        $ 121,596  

International and
emerging growth
funds

       --          47,285          --          47,285  

Debt securities:

                   

Core fixed income

       --          113,355          --          113,355  

High-yield bonds

       --          15,322          --          15,322  

Hedge funds

       --          --          13,453          13,453  

Cash

       677          --          --          677  

Total

     $ 677        $ 297,558        $ 13,453        $ 311,688  
Schedule Of Change In Fair Value Of Pension Plan Assets

year ended December 31

            

(add 000)

   2011     2010  

Balance at January 1

   $ 13,453      $ --   

Purchases

     --        13,000   

Unrealized (loss) gain

     (474     453   

Balance at December 31

   $ 12,979      $ 13,453   
Schedule Of Assumed Health Care Cost Trend Rate
      2011      2010  

Health care cost trend rate assumed for next year

     7.5%         8.0%   

Rate to which the cost trend rate gradually declines

     5.0%         5.0%   

Year the rate reaches the ultimate rate

     2017         2017   
Schedule Of One Percentage-Point Change In Assumed Health Care Cost Trend Rate
     One Percentage Point  

(add 000)

   Increase      (Decrease)  

Total service and interest cost
components

   $ 84       $ (72

Postretirement benefit obligation

   $ 1,340       $ (1,130
Pension [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Components Of Net Periodic Benefit Cost

(add 000)

   2011     2010     2009  

  Components of net periodic benefit cost:

      

  Service cost

   $ 11,270      $ 11,056      $ 11,169   

  Interest cost

     23,178        22,588        22,282   

  Expected return on assets

     (24,493     (21,041     (16,271

  Amortization of:

      

Prior service cost

     534        583        655   

Actuarial loss

     6,324        9,986        14,379   

Transition asset

     (1     (1     (1

  Settlement charge

     375        3,455        --   
   

  Net periodic benefit cost

   $ 17,187      $ 26,626      $ 32,213   
   
Schedule Of Recognized Comprehensive Earnings

  (add 000)

   2011     2010     2009  

  Actuarial loss (gain)

   $ 65,334      $ (10,915   $ (29,864

  Amortization of:

      

Prior service cost

     (534     (583     (655

Actuarial loss

     (6,324     (9,986     (14,379

Transition asset

     1        1        1   

  Settlement charge

     (375     (3,455     --   
   

  Total

   $ 58,102      $ (24,938   $ (44,897
   
Schedule Of Net Periodic Benefit Cost Not Yet Recognized
     2011     2010  
  

 

 

 

  (add 000)

   Gross     Net of tax     Gross     Net of tax  

  Prior service cost

   $ 2,555      $ 1,545      $ 3,089      $ 1,868   

  Actuarial loss

     156,994        94,903        98,359        59,458   

  Transition asset

     (12     (7     (11     (7
   

  Total

   $ 159,537      $ 96,441      $ 101,437      $ 61,319   
   
Schedule Of Change In Projected Benefit Obligation

  (add 000)

   2011     2010  

  Change in projected benefit obligation:

    

  Net projected benefit obligation at beginning of year

   $ 398,638      $ 392,737   

  Service cost

     11,270        11,056   

  Interest cost

     23,178        22,588   

  Actuarial loss

     41,971        2,017   

  Gross benefits paid

     (17,882     (29,760
   

  Net projected benefit obligation at end of year

   $ 457,175      $ 398,638   
   
Schedule Of Change In Plan Assets

  (add 000)

   2011     2010  

  Change in plan assets:

    

  Fair value of plan assets at beginning of year

   $ 311,688      $ 266,846   

  Actual return on plan assets, net

     1,129        33,973   

  Employer contributions

     30,215        40,629   

  Gross benefits paid

     (17,882     (29,760
   

  Fair value of plan assets at end of year

   $ 325,150      $ 311,688   
   
Schedule Of Funded Status

  (add 000)

   2011     2010  

  Funded status of the plan at
end of year

   $ (132,025   $ (86,950
   

  Accrued benefit cost

   $ (132,025   $ (86,950
   
Schedule Of Amounts Recognized On Consolidated Balance Sheet

  (add 000)

   2011     2010  

  Amounts recognized on consolidated balance sheets consist of:

    

  Current liability

   $   $

  Noncurrent liability

     (129,705     (85,016
   

  Net amount recognized at end of year

   $ (132,025   $ (86,950
   
Schedule Of Expected Benefit Payments

(add 000)

       

2012

   $ 20,425   

2013

   $ 20,046   

2014

   $ 21,494   

2015

   $ 23,244   

2016

   $ 24,872   

Years 2017 - 2021

   $ 147,271   
Postretirement Benefits [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Components Of Net Periodic Benefit Cost

     (add 000)

   2011     2010     2009  

Components of net periodic benefit cost:

      

Service cost

   $ 350      $ 548      $ 558   

Interest cost

     2,225        2,754        2,919   

Amortization of:

      

Prior service credit

     (1,740     (1,740     (1,489

Actuarial (gain) loss

     (85     13        --     

Total net periodic benefit cost

   $ 750      $ 1,575      $ 1,988   
Schedule Of Recognized Comprehensive Earnings

     (add 000)

   2011     2010     2009  

Actuarial (gain) loss

   $ (3,884   $ (4,133   $ 4,699   

Prior service credit

     (10,397     (1,722     --     

Amortization of:

      

Prior service credit

     1,740        1,740        1,489   

Actuarial gain (loss)

     85        (13     --     

Total

   $ (12,456   $ (4,128   $ 6,188   
Schedule Of Net Periodic Benefit Cost Not Yet Recognized
     2011     2010  

     (add 000)

   Gross     Net of
tax
    Gross     Net of tax  

Prior service credit

   $ (16,853   $ (10,188   $ (8,196   $ (4,954

Actuarial (gain) loss

     (3,210     (1,940     589        356   

Total

   $ (20,063   $ (12,128   $ (7,607   $ (4,598
Schedule Of Change In Projected Benefit Obligation

     (add 000)

   2011     2010  

Change in benefit obligation:

    

Net benefit obligation at beginning of year

   $ 45,210      $ 51,906   

Service cost

     350        548   

Interest cost

     2,225        2,754   

Participants' contributions

     1,925        1,919   

Actuarial gain

     (3,884     (4,133

Plan amendments

     (10,397     (1,722

Gross benefits paid

     (6,250     (6,523

Federal subsidy on benefits paid

     456        461   

Net benefit obligation at end of year

   $ 29,635      $ 45,210   
Schedule Of Change In Plan Assets

     (add 000)

   2011     2010  

Change in plan assets:

    

Fair value of plan assets at beginning of year

   $ --        $ --     

Employer contributions

     3,869        4,143   

Participants' contributions

     1,925        1,919   

Gross benefits paid

     (6,250     (6,523

Federal subsidy on benefits paid

     456        461   

Fair value of plan assets at end of year

   $ --        $ --     
Schedule Of Funded Status

     (add 000)

   2011     2010  

Funded status of the plan at end of year

   $ (29,635   $ (45,210

Accrued benefit cost

   $ (29,635   $ (45,210
Schedule Of Amounts Recognized On Consolidated Balance Sheet

     (add 000)

   2011     2010  

Amounts recognized on consolidated
balance sheets consist of:

    

Current liability

   $ (2,930   $ (4,100

Noncurrent liability

     (26,705     (41,110

Net amount recognized at end of year

   $ (29,635   $ (45,210
Schedule Of Weighted-Average Assumptions
Schedule Of Expected Benefit Payments

(add 000)

   Gross Benefit
Payments

2012

     $ 2,930  

2013

     $ 3,034  

2014

     $ 3,039  

2015

     $ 2,981  

2016

     $ 2,837  

Years 2017 - 2021

     $     11,487