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Loans Payable - Banks (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Loans Payable - Banks [Abstract]    
Weighted average interest rate on short-term borrowings 2.80% 0.80%
Foreign Subsidiaries [Member]
    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing amount   $ 25
Line of credit, amount outstanding 0 27.8
Foreign Subsidiaries [Member] | EURIBOR [Member]
    
Line of Credit Facility [Line Items]    
Variable rate 0.30%  
Foreign Subsidiaries [Member] | EURIBOR [Member] | Minimum [Member]
    
Line of Credit Facility [Line Items]    
Basis spread over variable interest rate 0.60%  
Foreign Subsidiaries [Member] | EURIBOR [Member] | Median [Member]
    
Line of Credit Facility [Line Items]    
Basis spread over variable interest rate 0.70%  
Foreign Subsidiaries [Member] | EURIBOR [Member] | Maximum [Member]
    
Line of Credit Facility [Line Items]    
Basis spread over variable interest rate 0.80%  
Parent and Domestic Subsidiaries [Member]
    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing amount 15  
Line of credit, amount outstanding $ 6.1 $ 0
Maturity May 01, 2014  
Parent and Domestic Subsidiaries [Member] | Prime Rate [Member]
    
Line of Credit Facility [Line Items]    
Basis spread over variable interest rate 0.50%  
Variable rate 3.25%