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Derivatives (Fair Value of Derivative Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Designated as hedge    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value $ 76 $ 0
Derivative liabilities, fair value 18 47
Designated as hedge | Foreign exchange contracts    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value 0  
Designated as hedge | Foreign exchange contracts | Other Liabilities    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value   0
Derivative liabilities, fair value 18 8
Designated as hedge | Interest rate swaps    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value 76 0
Designated as hedge | Interest rate swaps | Other Liabilities    
Derivative financial instruments on consolidated balance sheets    
Derivative liabilities, fair value 0 39
Not designated as hedge    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value 0 727
Derivative liabilities, fair value 0 0
Not designated as hedge | Foreign exchange contracts    
Derivative financial instruments on consolidated balance sheets    
Derivative liabilities, fair value 0 0
Not designated as hedge | Foreign exchange contracts | Other Assets    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value 0  
Not designated as hedge | Foreign exchange contracts | Other Liabilities    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value   702
Not designated as hedge | Interest rate cap    
Derivative financial instruments on consolidated balance sheets    
Derivative liabilities, fair value 0 0
Not designated as hedge | Interest rate cap | Other Assets    
Derivative financial instruments on consolidated balance sheets    
Derivative assets, fair value $ 0 $ 25