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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Measurements 
Schedule of changes in fair value of Level 3 items

 

 

Balance at December 31, 2010

 

$

56,668

 

Accretion of discount on contingent consideration liabilities

 

1,145

 

Payment of contingent acquisition related obligations

 

(40,000

)

Change in contingent acquisition related obligations

 

(17,813

)

Balance at September 30, 2011

 

$