XML 30 R78.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value of Plan Assets (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2009
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Pension Plans, Defined Benefit [Member]
Dec. 31, 2009
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Collateral held on loaned securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Collateral held on loaned securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Collateral held on loaned securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 2 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Cash and Cash Equivalents [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Cash and Cash Equivalents [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Equity Securities of U.S. Companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Equity Securities of U.S. Companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Equities Securities of International companies [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Equities Securities of International companies [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Insurance Investment Contract [Member]
Other Postretirement Benefit Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Collective and Mutual funds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Corporate Debt Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Collateral held on loaned securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Collateral held on loaned securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Collateralized Mortgage Backed Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
Municipal Bonds [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2011
Fair Value, Inputs, Level 3 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Dec. 31, 2010
Fair Value, Inputs, Level 3 [Member]
US Treasury Securities [Member]
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]                                                                                                                                                                                                                                                  
Number of Investment Managers of the Plan Assets     1     12                                                                                                                                                                                                                                      
Defined Benefit Plan Fair Value Of Plan Assets Before Obligations For Collateral Received             $ 303,292         $ 13,362       $ 102,944       $ 40,017       $ 63,111 [1]   $ 23,014 $ 23,842 [2]   $ 19,478   $ 8,285   $ 9,239       $ 193,034       $ 4,663       $ 102,944       $ 40,017       $ 45,410 [1]   $ 0 $ 0 [2]   $ 0   $ 0   $ 0       $ 109,564       $ 8,699       $ 0       $ 0       $ 17,701 [1]   $ 23,014 $ 23,148 [2]   $ 19,478   $ 8,285   $ 9,239       $ 694       $ 0       $ 0       $ 0       $ 0 [1]   $ 0   $ 694 [2]   $ 0   $ 0   $ 0
Defined Benefit Plan Fair Value Of Plan Assets Obligations For Collateral Received             25,694                                                           25,694                                                         0                                                         0                                                    
Defined Benefit Plan, Fair Value of Plan Assets     68,085 70,610 66,984 278,000 277,598 255,327 1,895 1,327 19,790   2,098 2,791 99,315   262 353 35,353   63,830 [3] 66,139 [4] 58,755 [5]   23,868     22,987   9,290   8,642   2,419 3,197 180,138 167,340 59 53 2,256   2,098 2,791 99,315   262 353 35,353   0 [3] 0 [4] 43,214 [5]   0     0   0   0   65,666 67,413 97,573 109,564 1,836 1,274 17,534   0 0 0   0 0 0   63,830 [3] 66,139 [4] 15,541 [5]   23,579     22,987   9,290   8,642   0 0 289 694 0 0 0   0 0 0   0 0 0   0 [3] 0 [4] 0 [5]   289       0   0   0  
Percentage investment in common stock of small-cap companies 34.00% 33.00%         6.00%                                                                                                                                                                                                                                    
Percentage investment in common stock of mid-cap companies 33.00% 35.00%       26.00% 28.00%                                                                                                                                                                                                                                    
Percentage investment in common stock of large-cap companies 32.00% 31.00% 49.00% 53.00%   26.00% 24.00%                                                                                                                                                                                                                                    
Percentage investment in US Treasuries     15.00%     13.00% 13.00%                                                                                                                                                                                                                                    
Percentage investment in mortgage backed securities     12.00% 12.00%     11.00%                                                                                                                                                                                                                                    
Percentage investment in corporate bonds     11.00% 21.00%   6.00% 10.00%                                                                                                                                                                                                                                    
Percentage investment in foreign fixed-income investments             8.00%                                                                                                                                                                                                                                    
Percentage investment in other investments     13.00% 14.00%   29.00%                                                                                                                                                                                                                                      
Change in net plan assets: [Roll Forward]                                                                                                                                                                                                                                                  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Beginning Balance                                                                                                                                                                                           694                                   0   694 937            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings                                                                                                                                                                                           (261)                                   (2)   (259) 189            
Defined Benefit Plan, Purchases, Sales, and Settlements                                                                                                                                                                                           (144)                                   291   (435) (432)            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Ending Balance                                                                                                                                                                                           $ 289                                   $ 289   $ 0 $ 694            
[1] (a) Collective and mutual funds invest approximately 28 percent in common stock of mid-cap U.S. companies, 24 percent in common stock of large-cap U.S. companies, 13 percent in U.S. Treasuries, 11 percent in mortgage-backed securities, 10 percent in corporate bonds, 8 percent in foreign fixed-income investments and 6 percent in common stock of small-cap U.S. companies.
[2] (b) This class includes collateral held at December 31, 2010, as a result of participation in a securities lending program. Cash collateral is invested by the trustee primarily in repurchase agreements, mutual funds and commercial paper.
[3] The insurance investment contract invests approximately 49 percent in common stock of large-cap U.S. companies, 15 percent in U.S. Treasuries, 12 percent in mortgage-backed securities, 11 percent in corporate bonds, and 13 percent in other investments.
[4] The insurance investment contract invests approximately 53 percent in common stock of large-cap U.S. companies, 21 percent in corporate bonds, 12 percent in mortgage-backed securities and 14 percent in other investments.
[5] a) Collective and mutual funds invest approximately 26 percent in common stock of mid-cap U.S. companies, 26 percent in common stock of large-cap U.S. companies, 13 percent in U.S. Treasuries, 6 percent in corporate bonds and 29 percent in other investments.