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Derivative Instruments (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]    
Unrealized Gain (Loss) on Derivatives $ 0  
Notional Amount 45,000,000  
Gain (Loss) Recognized in Income (720,000) 85,000
Other long term assets [Member] | Derivatives not designated as hedging instrument [Member] | Interest rate derivatives [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Assets 116,000  
Liabilities 0  
Interest expense [Member] | Derivatives not designated as hedging instrument [Member] | Interest rate derivatives [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Income (106,000) 0
Cost of goods sold [Member] | Derivatives not designated as hedging instrument [Member] | Commodity derivatives [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Income $ (614,000) $ 85,000