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Derivative Financial Instruments (Details Textual) (Interest Rate Swap [Member], USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Interest Rate Swap [Member]
   
Derivative Financial Instruments (Textual) [Abstract]    
Hedge ineffectiveness incurred $ 0 $ 0
Interest payments expense $ 127