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Note 5 - Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Text Block]
(5)           Goodwill and Intangible Assets

Goodwill at December 31, 2011 and March 31, 2012 consists of the following (in thousands):

   
December 31,
2011
   
March 31,
2012
 
Balance at beginning of period
  $ 90,582     $ 300,260  
Goodwill acquired during the period
    209,619       —  
Adjustments to prior year acquisitions
    1,799       1,078  
Effect of foreign currency translation
    (1,740 )     1,681  
Balance at end of period
  $ 300,260     $ 303,019  

Intangible assets at December 31, 2011 and March 31, 2012, consist of the following (in thousands):

      December 31, 2011  
 
Estimated useful lives
 
Gross
carrying
amount
   
Accumulated
amortization
   
Net carrying
carrying
value
 
                     
Amortizable intangible assets:
                   
Customer relationships
40 to 60 months
  $ 157,826     $ (50,438 )   $ 107,388  
Tradenames
45 to 84 months
    48,046       (13,277 )     34,769  
Covenants not to compete
36 months
    2,784       (1,587 )     1,197  
Technology
24 to 40 months
    6,750       (3,936 )     2,814  
Totals
    $ 215,406     $ (69,238 )   $ 146,168  

     
March 31, 2012
 
 
Estimated useful lives
 
Gross
carrying
amount
   
Accumulated
amortization
   
Net carrying
carrying
value
 
Amortizable intangible assets:
                   
Customer relationships
40 to 60 months
  $ 159,601     $ (60,037 )   $ 99,564  
Tradenames
45 to 84 months
    48,521       (16,072 )     32,449  
Covenants not to compete
36 months
    2,799       (1,795 )     1,004  
Technology
24 to 40 months
    6,833       (4,634 )     2,199  
Totals
    $ 217,754     $ (82,538 )   $ 135,216  

The aggregate intangible amortization expense was $7.9 million and $12.8 million for the three months ended March 31, 2011 and 2012, respectively.  The estimated future amortization expense of intangible assets is as follows (in thousands):

   
Amount
 
         
Nine months ended December 31, 2012
 
$
36,752
 
Year ended December 31:
       
2013
   
43,405
 
2014
   
27,357
 
2015
   
18,651
 
2016
   
6,173
 
Thereafter
   
2,878
 
Total
 
$
135,216