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Business Combinations (Tables)
9 Months Ended
Sep. 30, 2014
Business Acquisition, Contingent Consideration [Line Items]  
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Balance at December 31, 2013
$
2,289

Increase in fair value of contingent consideration liabilities
187

Payment of contingent consideration
(741
)
Balance at September 30, 2014
$
1,735