Annual report pursuant to Section 13 and 15(d)

Fair Value Of Measurements (Schedule Of Assets And Liabilities Measured On A Nonrecurring Basis) (Details)

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Fair Value Of Measurements (Schedule Of Assets And Liabilities Measured On A Nonrecurring Basis) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets fair value $ 10,729   $ 1,281
Liabilities fair value 25    
Goodwill, Losses 29,507    
Long-lived assets, Losses   $ 2,056  
Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets, Losses 29,507    
Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets fair value 9,824  
Liabilities fair value  
Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets fair value 905   1,281
Liabilities fair value 25    
Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets fair value  
Liabilities fair value