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Note 5 - Goodwill and Intangible Assets
9 Months Ended
Sep. 30, 2011
Goodwill and Intangible Assets Disclosure [Text Block]
(5)           Goodwill and Intangible Assets

Goodwill at December 31, 2010 and September 30, 2011 consists of the following (in thousands):

   
December 31,
2010
   
September 30,
2011
 
Balance at beginning of period
  $ 32,395     $ 90,582  
Goodwill acquired during the period
    57,877       198,574  
Adjustments to prior year acquisitions
    (303 )     1,450  
Effect of foreign currency translation
    613       (1,823 )
Balance at end of period
  $ 90,582     $ 288,783  

Intangible assets at December 31, 2010 and September 30, 2011, consist of the following (in thousands):

     
December 31, 2010
 
  Estimated useful lives   Gross
carrying
amount
    Accumulated
amortization
    Net
carrying
value
 
Amortizable intangible assets:                    
Customer relationships
40 to 42 months
  $ 70,163     $ (19,130 )   $ 51,033  
Tradenames
45 months
    17,883       (4,606 )     13,277  
Covenants not to compete
36 months
    1,729       (841 )     888  
Technology
24 to 40 months
    3,427       (1,711 )     1,716  
Totals
    $ 93,202     $ (26,288 )   $ 66,914  

     
September 30, 2011
 
     
Gross
         
Net
 
     
carrying
   
Accumulated
   
carrying
 
 
Estimated useful lives
 
amount
   
amortization
   
value
 
Amortizable intangible assets:
                 
Customer relationships
40 to 60 months
  $ 146,836     $ (41,013 )   $ 105,823  
Tradenames
45 to 84 months
    47,364       (10,632 )     36,732  
Covenants not to compete
36 months
    2,780       (1,397 )     1,383  
Technology
24 to 40 months
    6,830       (3,223 )     3,607  
Totals
    $ 203,810     $ (56,265 )   $ 147,545  

The aggregate intangible amortization expense for the three and nine months ended September 30, 2010 was $5.4 million and $11.4 million, respectively.  The aggregate intangible amortization expense for the three and nine months ended September 30, 2011 was $12.0 million and $30.4 million, respectively.  The estimated future amortization expense of intangible assets is as follows (in thousands):

   
Amount
 
Three months ended December 31, 2011
  $ 12,392  
Year ended December 31:
       
2012
    45,504  
2013
    39,517  
2014
    23,636  
2015
    17,475  
Thereafter
    9,021  
Total
  $ 147,545