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Note 5 - Acquisition-Related Items (Tables)
 12 Months Ended
Dec. 31, 2013
Business Combination Disclosure Acquisition Related Items [Abstract]  
 
 
2013
   
2012
   
2011
 
 
 
 
   
 
   
 
 
Contingent consideration compensation expense
  $ 6,181     $ 5,096     $ 2,819  
Contingent consideration fair value adjustments
    1,801       3,645       969  
Transaction costs
    3,336       5,032       861  
Reclassification from accumulated other comprehensive loss
    -       2,553       -  
Gain on revaluation of previously held equity investment (note 3)
    (820 )     -       -  
 
  $ 10,498     $ 16,326     $ 4,649