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Derivatives (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Derivative Assets $ 20 $ 3,315
Derivative Liabilities (1,163) (1,970)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
   
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Derivative Assets 0 0
Derivative Liabilities (101) (1,818)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
   
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Derivative Assets 20 945
Derivative Liabilities 0 0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
   
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]    
Derivative Assets 0 2,370
Derivative Liabilities $ (1,062) $ (152)