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Contingent Consideration
3 Months Ended
Mar. 31, 2013
Contingent Consideration [Abstract]  
Contingent Consideration
10.  
Contingent Consideration

ASC Topic 805 requires that contingent consideration be recognized at fair value on the acquisition date and be re-measured each reporting period with subsequent adjustments recognized in the consolidated statement of operations.
 
As of March 31, 2013 and December 31, 2012, contingent consideration included in the other current liabilities on the consolidated balance sheet totaled $1.3 million and $1.6 million, respectively.  As of March 31, 2013 and December 31, 2012, the Company also had accrued contingent consideration totaling $363,000 and $902,000, respectively, which is included in other long-term liabilities on the consolidated balance sheet and represents the portion of contingent consideration estimated to be payable greater than twelve months from the balance sheet date.  During the three months ended March 31, 2013 the Company made payments of $979,000 related to the liability classified contingent consideration arrangements.