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Note 4 - Intangible Assets
12 Months Ended
Dec. 31, 2015
Notes to Financial Statements  
Goodwill and Intangible Assets Disclosure [Text Block]
4. Intangible Assets
 
Intangible assets consisted of the following as of December 31, 2015 and 2014 (
in thousands
):
 
    Gross Value   Accumulated
Amortization
  Net Book
Value
  Useful Life
(years)
December 31, 2015                                
Customer relationships   $ 101,806     $ (57,497 )   $ 44,309      5 - 10
Restrictive covenants     16,800       (13,580 )     3,220      3 - 7
Trade name     17,000       (10,221 )     6,779      3 - 5
    $ 135,606     $ (81,298 )   $ 54,308          
                                 
December 31, 2014                                
Customer relationships   $ 102,755     $ (44,020 )   $ 58,735      5 - 10
Restrictive covenants     18,000       (11,394 )     6,606      3 - 7
Trade name     17,000       (7,763 )     9,237      3 - 5
    $ 137,755     $ (63,177 )   $ 74,578          
 
Amortization expense of intangible assets is expected to approximate the following (
in thousands
):
 
Year ending December 31,      
2016   $ 19,934    
2017     16,613    
2018     15,992    
2019     1,582    
2020     187    
Thereafter     -    
 
For the years ended December 31, 2015, 2014 and 2013, amortization expense related to intangible assets was $20.3 million, $20.7 million and $23.6 million, respectively.
 
There were no changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2014.