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Employee Benefit Plans (Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Amortization of net loss $ (926) $ (159) $ (1,344)
Total recognized in other comprehensive loss 8 (9,581) $ 13,176
Defined Benefit Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net actuarial gain (loss) (894) (9,669)  
Amortization of net loss 926 159  
Amortization of prior service cost (credit) 20 20  
Total recognized in other comprehensive loss 52 (9,490)  
Other Postretirement Benefit Plans Defined Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net actuarial gain (loss) 7 (40)  
Amortization of net loss 17 17  
Amortization of prior service cost (credit) (68) (68)  
Total recognized in other comprehensive loss $ (44) $ (91)