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Employee Benefit Plans (Tables)
12 Months Ended
Oct. 31, 2012
Employee Benefit Plans Disclosure [Abstract]  
Defined Contribution Restoration Plan

The funding to the DCR plan accounts for the years ended October 31, 2012 and 2011, and the amounts recorded as liabilities for these deferred compensation plans as of October 31, 2012 and 2011 are presented below.

In thousands  2012  2011
       
Funding $ 422 $ 352
Liability:      
Current   160   52
Noncurrent   2,412   1,766
Term Life Insurance Premiums

The cost of these premiums is presented below.

In thousands 2012  2011  2010
         
Term life policies of certain officers at the vice president        
level and above$ 43 $ 56 $ 57
Officers and director-level employees  25   24   24
Reconciliation Of Changes In The Plan's Benefit Obligations And Fair Value Of Assets; Statement Of The Funded Status And The Amounts Reflected In The Consolidated Balance Sheets

A reconciliation of changes in the plans' benefit obligations and fair value of assets for the years ended October 31, 2012 and 2011, and a statement of the funded status and the amounts reflected in the Consolidated Balance Sheets for the years ended October 31, 2012 and 2011 are presented below.

 Qualified Pension Nonqualified Pension Other Benefits
In thousands2012 2011 2012 2011 2012 2011
                  
Accumulated benefit obligation at year end$ 245,361 $ 205,159 $ 5,569 $ 5,219  N/A  N/A
                  
Change in projected benefit obligation:                 
Obligation at beginning of year$ 236,632 $ 211,003 $ 5,219 $ 5,039 $ 31,900 $ 31,919
Service cost  9,573   8,508   39   45   1,387   1,398
Interest cost  10,640   11,024   203   209   1,347   1,495
Plan amendments  -   -   -   290   -   -
Actuarial (gain) loss  54,852   16,896   629   130   2,630   (327)
Participant contributions  -   -   -   -   788   898
Administrative expenses  (420)   (391)   -   -   -   -
Benefit payments  (17,950)   (10,408)   (521)   (494)   (3,222)   (3,483)
Obligation at end of year  293,327   236,632   5,569   5,219   34,830   31,900
                  
Change in fair value of plan assets:                 
Fair value at beginning of year  259,511   228,345   -   -   22,045   21,636
Actual return on plan assets  31,196   19,965   -   -   1,972   792
Employer contributions  -   22,000   521   494   2,080   2,202
Participant contributions  -   -   -   -   788   898
Administrative expenses  (420)   (391)   -   -   -   -
Benefit payments  (17,950)   (10,408)   (521)   (494)   (3,222)   (3,483)
Fair value at end of year  272,337   259,511   -   -   23,663   22,045
Funded status at year end - (under) over$ (20,990) $ 22,879 $ (5,569) $ (5,219) $ (11,167) $ (9,855)
                  
Noncurrent assets$ - $ 22,879 $ - $ - $ - $ -
Current liabilities  -   -   (502)   (517)   -   -
Noncurrent liabilities  (20,990)   -   (5,067)   (4,702)   (11,167)   (9,855)
Net amount recognized$ (20,990) $ 22,879 $ (5,569) $ (5,219) $ (11,167) $ (9,855)
                  
Amounts Not Yet Recognized as a Component               
of Cost and Recognized in a Deferred               
Regulatory Account:               
Unrecognized transition obligation$ - $ - $ - $ - $ (667) $ (1,334)
Unrecognized prior service (cost) credit  19,441   21,638   (277)   (358)   -   -
Unrecognized actuarial loss  (137,633)   (99,653)   (1,521)   (941)   (2,633)   (424)
Regulatory asset  (118,192)   (78,015)   (1,798)  (1,299)  (3,300)   (1,758)
Cumulative employer contributions in                 
excess of cost  97,202   100,894   (3,771)   (3,920)   (7,867)   (8,097)
Net amount recognized$ (20,990) $ 22,879 $ (5,569) $ (5,219) $ (11,167) $ (9,855)
                  
Components Of Net Periodic Benefit Cost

Net periodic benefit cost for the years ended October 31, 2012, 2011 and 2010 includes the following components.

 Qualified Pension Nonqualified Pension Other Benefits
In thousands2012 2011 2010 2012 2011 2010 2012 2011 2010
                           
Service cost$ 9,573 $ 8,508 $ 8,069 $ 39 $ 45 $ 38 $ 1,387 $ 1,398 $ 1,337
Interest cost  10,640   11,024   10,898   203   209   243   1,347   1,495   1,906
Expected return on plan                          
assets  (20,289)   (20,608)   (18,773)   -   -   -   (1,551)   (1,534)   (1,381)
Amortization of transition                          
obligation  -   -   -   -   -   -   667   667   667
Amortization of prior                          
service cost (credit)  (2,198)   (2,198)   (2,198)   81   20   20   -   -   -
Amortization of net loss  5,966   3,547   1,998   49   41   9   -   -   236
Net periodic benefit                          
(income) cost  3,692   273   (6)   372   315   310   1,850   2,026   2,765
Other changes in plan                          
assets and benefit                          
obligation recognized                          
through regulatory asset                          
or liability:                          
Prior service cost  -   -   -   -   290   -   -   -   -
Net loss (gain)  43,945   17,539   (6,587)   629   130   420   2,209   415   (5,229)
Amounts recognized as a                          
component of net periodic                          
benefit cost:                          
Transition obligation  -   -   -   -   -   -   (667)   (667)   (667)
Amortization of net loss  (5,966)   (3,547)   (1,998)   (49)   (41)   (9)   -   -   (236)
Prior service (cost) credit  2,198   2,198   2,198   (81)   (20)   (20)   -   -   -
Total recognized in                          
regulatory asset (liability)  40,177   16,190   (6,387)   499   359   391   1,542   (252)   (6,132)
Total recognized in net                          
periodic benefit cost and                          
regulatory asset (liability)$ 43,869 $ 16,463 $ (6,393) $ 871 $ 674 $ 701 $ 3,392 $ 1,774 $ (3,367)
Amortization Recorded As A Regulatory Asset Or Liability Expected Refunds For Defined Benefit Plans

The 2013 estimated amortization of the following items, which are recorded as a regulatory asset or liability instead of accumulated OCI discussed above, and expected refunds for our plans are as follows.

In thousandsQualified Pension Nonqualified Pension Other Benefits
         
Amortization of transition obligation$ - $ - $ 667
Amortization of unrecognized prior service cost (credit)  (2,198)   81   -
Amortization of unrecognized actuarial loss  10,982   161   -
Refunds expected  -   -   -
Benefit Obligation Benchmark Discount Rate

As of October 31, 2012, the benchmark by plan was as follows.

Pension plan 3.51%
NCNG SERP 2.90%
Directors' SERP 3.08%
Piedmont SERP 2.32%
OPEB 3.34%
The Weighted Average Assumptions Used To Determine The Benefit Obligation and Net Periodic Benefit Cost

The weighted average assumptions used in the measurement of the benefit obligation as of October 31, 2012 and 2011 are presented below.

 Qualified PensionNonqualified PensionOther Benefits
 201220112012201120122011
       
Discount rate3.51%4.67%2.95%4.10%3.34%4.36%
Rate of compensation increase3.76%3.78%N/AN/AN/AN/A

The weighted average assumptions used to determine the net periodic benefit cost as of October 31, 2012, 2011 and 2010 are presented below.

 Qualified PensionNonqualified Pension
 201220112010201220112010
       
Discount rate4.67%5.47%5.99%4.10%4.37%5.28%
Expected long-term rate of return on plan assets8.00%8.00%8.00%N/AN/AN/A
Rate of compensation increase3.78%3.87%3.92%N/AN/AN/A
       
 Other Benefits   
 201220112010   
       
Discount rate4.36%4.85%5.58%   
Expected long-term rate of return on plan assets8.00%8.00%8.00%   
Rate of compensation increaseN/AN/AN/A   
Anticipated Employer Contribution To Benefit Plans

We anticipate that we will contribute the following amounts to our plans in 2013.

In thousands  
   
Qualified pension plan$ 20,000
Nonqualified pension plans  502
MPP plan  695
OPEB plan  1,500
Expected Benefit Payments For The Next Ten Years

Benefit payments, which reflect expected future service, as appropriate, are expected to be paid for the next ten years ending October 31 as follows.

 Qualified Nonqualified Other
In thousandsPension Pension Benefits
         
2013$ 25,080 $ 502 $ 2,002
2014  15,035   476   2,129
2015  15,325   484   2,209
2016  15,099   456   2,261
2017  16,101   430   2,354
2018 - 2022  101,130   1,988   12,861
Assumed Health Care Cost Trend Rates

The assumed health care cost trend rates used in measuring the accumulated OPEB obligation for the medical plans for all participants as of October 31, 2012 and 2011 are presented below.

 2012 2011
    
Health care cost trend rate assumed for next year7.50% 7.70%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)5.00% 5.00%
Year that the rate reaches the ultimate trend rate2027 2027
Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A change of 1% would have the following effects.

In thousands  1% Increase 1% Decrease
        
Effect on total of service and interest cost components of net periodic       
postretirement health care benefit cost for the year ended October 31, 2012  $ 33 $ (34)
Effect on the health care cost component of the accumulated postretirement       
benefit obligation as of October 31, 2012    677   (701)
Redemption Limitations, Restrictions and Notice Requirements

As stated above, some of our investments for the qualified pension plan have redemption limitations, restrictions and notice requirements which are further explained below.

      Redemptions
  Redemption   Notice
Investment Frequency Other Redemption Restrictions Period
       
Common trust fund -  Monthly None 30 days
International growth      
       
Hedge fund of funds Quarterly Redeemed in whole or part but not less than the minimum redemption amount for each currency. Redemption within one year of purchase is subject to 1.5% redemption fee. Redeemed on "first in first out" basis. None of our investment is subject to the redemption fee. Fund's Board of Directors may limit or suspend share redemptions until a further notification ending suspension. No such notification has been received as of October 31, 2012. 65 days
       
Private equity fund of funds Limited Investors have only very limited withdrawal rights for specific legal or regulatory reasons. Any transfer of interest will be subject to approval. (1)
       
Commodities fund of funds Monthly Redemption within one year of purchase is subject to 1% redemption fee. None of our investment is subject to the redemption fee. If 95% or more of the balance is requested, 95% of the balance will be paid within 30 days. Any outstanding balance or interest owed will be paid after the annual audit is complete. 35 days
       
(1) The investment cannot be redeemed. We receive distributions only through the liquidation of the underlying assets. The assets are expected to be liquidated over the next 10 to 12 years.
The Qualified Pension And The OPEB Plan's Asset Allocations By Level Within The Fair Value Hierarchy

The qualified pension plan's asset allocations by level within the fair value hierarchy at October 31, 2012 and 2011 are presented below.

 Qualified Pension Plan as of October 31, 2012
  Significant   
 Quoted PricesOtherSignificant  
 in ActiveObservableUnobservableTotal 
 MarketsInputsInputsCarrying% of
In thousands(Level 1)(Level 2)(Level 3)ValueTotal
              
Cash and cash equivalents$ 5,346 $ - $ - $ 5,346 2%
Fixed Income Securities:            45%
U.S. treasuries  -   17,544   -   17,544 6%
Long duration bonds  -   63,565   -   63,565 23%
Corporate bonds   -   26,368   -   26,368 10%
High yield bonds  13,777   -   -   13,777 5%
Collateralized mortgage             
obligations  -   1,513   -   1,513 1%
Municipals  -   345   -   345 -\%
Derivatives  (3)   (86)   -   (89) -\%
Equity Securities:            36%
Large cap core index  10,260   -   -   10,260 4%
Large cap value  10,427   -   -   10,427 4%
Large cap growth  15,252   -   -   15,252 6%
Small cap value  26,335   -   -   26,335 10%
International value  14,376   -   -   14,376 5%
Common trust fund - International             
growth  -   18,678   -   18,678 7%
Real Estate:            6%
Global REIT  16,252   -   -   16,252 6%
Other Investments:            11%
Hedge fund of funds  -   16,995   -   16,995 6%
Private equity fund of funds  -   -   3,522   3,522 1%
Commodities fund of funds  -   11,871   -   11,871 4%
Total assets at fair value$ 112,022 $ 156,793 $ 3,522 $ 272,337 100%
Percent of fair value hierarchy 41%  58%  1%  100%  

 Qualified Pension Plan as of October 31, 2011
     Significant        
  Quoted Prices  Other  Significant     
  in Active  Observable  Unobservable  Total  
  Markets  Inputs  Inputs  Carrying % of
In thousands (Level 1)  (Level 2)  (Level 3)  Value Total
              
Cash and cash equivalents$ 5,891 $ 2 $ - $ 5,893 2%
Fixed Income Securities:            45%
U.S. treasuries  -   11,109   -   11,109 4%
Long duration bonds  66,824   -   -   66,824 26%
Corporate bonds   -   24,383   -   24,383 9%
High yield bonds  12,504   -   -   12,504 5%
Collateralized mortgage             
obligations  -   1,448   -   1,448 1%
Municipals  -   324   -   324 -\%
Derivatives  (25)   437   -   412 -\%
Equity Securities:            35%
Large cap core index  11,206   -   -   11,206 4%
Large cap value  8,623   -   -   8,623 3%
Large cap growth  15,897   -   -   15,897 6%
Small cap value  23,827   -   -   23,827 9%
International value  13,770   -   -   13,770 6%
Common trust fund - International             
growth  18,057   -   -   18,057 7%
Real Estate:            6%
Global REIT  14,909   -   -   14,909 6%
Other Investments:            12%
Hedge fund of funds  -   10,089   6,207   16,296 6%
Private equity fund of funds  -   -   1,925   1,925 1%
Commodities fund of funds  -   3,632   8,472   12,104 5%
Total assets at fair value$ 191,483 $ 51,424 $ 16,604 $ 259,511 100%
Percent of fair value hierarchy 74%  20%  6%  100%  

 Other Benefits as of October 31, 2012
    Significant       
 Quoted PricesOtherSignificant    
 in ActiveObservableUnobservableTotal 
 MarketsInputsInputsCarrying% of
In thousands(Level 1)(Level 2)(Level 3)ValueTotal
              
Cash and cash equivalents$ 926 $ - $ - $ 926 4%
Fixed Income Securities:            46%
U.S. treasuries  2,345   -   -   2,345 10%
Corporate bonds / Asset-backed             
securities  8,474   -   -   8,474 36%
Equity Securities:            45%
Large cap value  1,221   -   -   1,221 5%
Large cap growth  1,149   -   -   1,149 5%
Small cap value  1,177   -   -   1,177 5%
Small cap growth  1,155   -   -   1,155 5%
Large cap index  2,148   -   -   2,148 9%
International blend  3,907   -   -   3,907 16%
Real Estate:            5%
Global REIT  1,161   -   -   1,161 5%
Total assets at fair value$ 23,663 $ - $ - $ 23,663 100%
Percent of fair value hierarchy 100%  -\%  -\%  100%  

 Other Benefits as of October 31, 2011  
  Significant   
 Quoted PricesOtherSignificant  
 in ActiveObservableUnobservableTotal 
 MarketsInputsInputsCarrying% of
In thousands(Level 1)(Level 2)(Level 3)ValueTotal
              
Cash and cash equivalents$ 1,011 $ - $ - $ 1,011 5%
Fixed Income Securities:            45%
U.S. treasuries  2,162   -   -   2,162 10%
Corporate bonds / Asset-backed             
securities  7,790   -   -   7,790 35%
Equity Securities:            45%
Large cap value  1,108   -   -   1,108 5%
Large cap growth  1,107   -   -   1,107 5%
Small cap value  1,092   -   -   1,092 5%
Small cap growth  1,131   -   -   1,131 5%
Large cap index  1,996   -   -   1,996 9%
International blend  3,557   -   -   3,557 16%
Real Estate:            5%
Global REIT  1,091   -   -   1,091 5%
Total assets at fair value$ 22,045 $ - $ - $ 22,045 100%
Percent of fair value hierarchy 100%  -\%  -\%  100%  
Level 3 Qualified Pension Plan Reconciliation

During the period, we transferred amounts from Level 3 to Level 2 for our investments in the hedge fund of funds and the commodities fund of funds because inputs became more observable. Long duration bonds and the common trust fund – international growth investments were classified as Level 1 assets as of October 31, 2011 and as Level 2 assets at October 31, 2012 due to changes in observable inputs. The following is a reconciliation of the assets in the qualified pension plan that are classified as Level 3 in the fair value hierarchy.

    Private      
 Hedge Fund Equity Fund Commodities   
In thousandsof Funds of Funds Fund of Funds  Total
            
Balance, October 31, 2010$ 5,196 $ 580 $ - $ 5,776
Actual return on plan assets:           
Relating to assets still held at the reporting date  (1,236)   66   (488)   (1,658)
Relating to assets sold during the period  -   -   -   -
Purchases, sales and settlements (net)  2,247   1,279   8,960   12,486
Transfer in/out of Level 3  -   -   -   -
Balance, October 31, 2011  6,207   1,925   8,472   16,604
Actual return on plan assets:           
Relating to assets still held at the reporting date  -   13   -   13
Relating to assets sold during the period  -   145   -   145
Purchases, sales and settlements (net)  -   1,439   -   1,439
Transfer in/out of Level 3  (6,207)   -   (8,472)   (14,679)
Balance, October 31, 2012$ - $ 3,522 $ - $ 3,522
401(K) Matching Contributions

For the years ended October 31, 2012, 2011 and 2010, we made matching contributions to participant accounts as follows.

In thousands 2012 2011 2010
          
401(k) matching contributions $ 5,400 $ 5,203 $ 5,269