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Fair Value Measurement
6 Months Ended
Jun. 30, 2011
Fair Value Measurement [Abstract]  
Fair Value Measurement
4.  
Fair Value Measurement
   
Accounting guidance on fair value measurements for certain financial assets and liabilities requires that assets and liabilities carried at fair value be classified and disclosed in one of the following three categories:
         
Level 1
    Quoted market prices in active markets for identical assets or liabilities.
 
       
Level 2
    Observable market-based inputs or unobservable inputs that are corroborated by market data.
 
       
Level 3
    Unobservable inputs reflecting the reporting entity’s own assumptions or external inputs from inactive markets.
   
A financial asset or liability’s classification within the hierarchy is determined based on the lowest level of input that is significant to the fair value measurement.
   
The following table presents information, as of June 30, 2011 and December 31, 2010, about the Company’s financial liabilities, the contingent purchase price related to acquisitions that are measured at fair value on a recurring basis, according to the valuation techniques the Company used to determine their fair values (in thousands):
June 30, 2011
                                 
                            Fair  
    Level 1     Level 2     Level 3     Value  
Contingent purchase price related to acquisitions
  $     $     $ 3,946     $ 3,946  
                         
Total liabilities at fair value
  $     $     $ 3,946     $ 3,946  
                         
December 31, 2010
                                 
                            Fair  
    Level 1     Level 2     Level 3     Value  
Contingent purchase price related to acquisitions
  $     $     $ 2,977     $ 2,977  
                         
Total liabilities at fair value
  $     $     $ 2,977     $ 2,977  
                         
   
In measuring the fair value of the contingent payment liability, the Company used an income approach that considers the expected future earnings of the acquired businesses and the resulting contingent payments, discounted at a risk-adjusted rate.
   
The table below sets forth a reconciliation of the Company’s beginning and ending Level 3 financial liability balance for the three months ended and six months ended June 30, 2011 (in thousands):
         
Balance as of March 31, 2011
  $ 1,304  
Acquisition of Bruenger
    2,581  
Payment of contingent purchase obligation
     
Adjustment to contingent purchase obligation
    61  
       
Balance as of June 30, 2011
  $ 3,946  
       
 
       
Balance as of December 31, 2010
  $ 2,977  
Acquisition of Bruenger
    2,581  
Payment of contingent purchase obligation
    (1,712 )
Adjustment to contingent purchase obligation
    100  
       
Balance as of June 30, 2011
  $ 3,946