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Contingent Consideration (Details Textual) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Business Acquisition, Contingent Consideration [Line Items]      
Payment of Contingent Consideration $ 0 $ 1,270  
Business Combination, Contingent Consideration, Liability $ 5,102   $ 5,064