Pension And Postretirement Benefits (Schedule Of Fair Value Of Company Pension Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	$ 678,250	$ 661,319
Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	131,953	108,979
Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	546,297	535,171
Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value		17,169
Cash And Money Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	38,084	11,862
Cash And Money Markets [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	38,084	11,862
Cash And Money Markets [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Cash And Money Markets [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Common Stocks Actively Managed U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	93,869	97,117
Common Stocks Actively Managed U.S. Equities [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	93,869	97,117
Common Stocks Actively Managed U.S. Equities [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Common Stocks Actively Managed U.S. Equities [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Fixed Income Bonds And Notes [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	25,485	23,579
Fixed Income Bonds And Notes [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Fixed Income Bonds And Notes [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	25,485	23,579
Fixed Income Bonds And Notes [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	26,322	25,954
U.S. Equity Funds [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Equity Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	26,322	25,954
U.S. Equity Funds [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Non-U.S. Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	198,655	228,551
Non-U.S. Equity Funds [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Non-U.S. Equity Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	198,655	228,551
Non-U.S. Equity Funds [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Government And Corporate Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	33,810	41,787
U.S. Government And Corporate Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Government And Corporate Fixed Income [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	33,810	41,787
U.S. Government And Corporate Fixed Income [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Non-U.S. Fixed Income, Government And Corporate [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	159,611	145,811
Non-U.S. Fixed Income, Government And Corporate [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Non-U.S. Fixed Income, Government And Corporate [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	159,611	145,811
Non-U.S. Fixed Income, Government And Corporate [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
International Balanced Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	8,223	6,017
International Balanced Funds [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
International Balanced Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	8,223	6,017
International Balanced Funds [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Tactical Allocation Balanced Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	16,455
U.S. Tactical Allocation Balanced Fund [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
U.S. Tactical Allocation Balanced Fund [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	16,455
U.S. Tactical Allocation Balanced Fund [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	67,967	71,549
Hedge Funds [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Hedge Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	67,967	54,380
Hedge Funds [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value		17,169	14,885
International Property Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	9,011	8,347
International Property Funds [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
International Property Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	9,011	8,347
International Property Funds [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	758	745
Annuity Contract [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value
Annuity Contract [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	758	745
Annuity Contract [Member] | Significant Unobservable Inputs Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value