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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Line Items]      
Statutory tax rate, percentage 35.00% 35.00% 35.00%
Net current deferred tax assets $ 7,622,000 $ 7,853,000  
Undistributed earnings of foreign subsidiaries 26,478,000    
Cash held in foreign operations 21,183,000    
Deferred tax assets, net of operating losses 1,901,000    
Deferred tax assets, net of operating losses $ 32,756,000    
Minimum [Member]
      
Income Taxes [Line Items]      
Statute of limitations expiration period, in years 4 years    
Net operating loss carry forwards, expiration years 2014    
Minimum [Member] | Germany [Member]
      
Income Taxes [Line Items]      
Tax examination, years 2009    
Maximum [Member]
      
Income Taxes [Line Items]      
Statute of limitations expiration period, in years 10 years    
Net operating loss carry forwards, expiration years 2033    
Maximum [Member] | Germany [Member]
      
Income Taxes [Line Items]      
Tax examination, years 2012