|**Pension Plans And Other Postretirement Benefits (Tables)**   | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|**Pension Plans And Other Postretirement Benefits [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Components Of Net Periodic Benefit Costs                       | Pension BenefitsThree Months EndedMarch 31,2014
				
				2013Service cost
				
				$
				1,143
				
				$
				1,446Interest cost
				
				
				3,512
				
				
				3,165Expected return on plan assets
				
				
				(4,305)
				
				
				(3,693)Amortization of prior service cost
				
				
				69
				
				
				57Amortization of actuarial loss
				
				
				500
				
				
				2,016Net periodic benefit cost
				
				$
				919
				
				$
				2,991OtherPostretirement BenefitsThree Months EndedMarch 31,2014
				
				2013Service cost
				
				$
				312
				
				$
				425Interest cost
				
				
				737
				
				
				667Expected return on plan assets
				
				
				(683)
				
				
				(560)Amortization of prior service cost
				
				
				(74)
				
				
				(74)Amortization of actuarial loss
				
				
				82
				
				
				345Net periodic benefit cost
				
				$
				374
				
				$
				803
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|                                                               | Service cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                               | Interest cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                               | Expected return on plan assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                               | Amortization of prior service cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                               | Amortization of actuarial loss                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                               | Net periodic benefit cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|                                                               | Service cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                               | Interest cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                               | Expected return on plan assets                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                               | Amortization of prior service cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                               | Amortization of actuarial loss                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                               | Net periodic benefit cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

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