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Note 5 - Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]

(5)

Goodwill and Intangible Assets


Goodwill by segment at December 31, 2014 and 2015 consists of the following (in thousands) (1):


   

United

States

   

Canada

   

United

Kingdom

   

Australia

   

Total

 

Balance at December 31, 2013

  $ 273,070       19,279       39,593       37,370       369,312  

Goodwill acquired during the year

    128,426             1,640       5,968       136,034  

Adjustments to prior year acquisitions

    64             (324

)

          (260

)

Effect of foreign currency translation

          (2,101

)

    (2,555

)

    (4,751

)

    (9,407

)

Balance at December 31, 2014

    401,560     $ 17,178     $ 38,354     $ 38,587     $ 495,679  

Goodwill acquired during the year

    10,742       222       13,332             24,296  

Adjustments to prior year acquisitions

    200                         200  

Effect of foreign currency translation

          (2,036

)

    (2,258

)

    (7,584

)

    (11,878

)

Balance at December 31, 2015

  $ 412,502     $ 15,364     $ 49,428     $ 31,003     $ 508,297  

 

(1)

Goodwill recorded in connection with certain tax benefits to be realized in the Company’s U.S. income tax returns has been reflected in the United States segment.


Intangible assets at December 31, 2014 and 2015, consist of the following (in thousands):


             

December 31, 2014

 
   

Estimated

useful lives

(months)

   

Gross

carrying

amount

   

Accumulated

amortization

   

Net

carrying

value

 

Amortizable intangible assets:

                                 

Customer relationships

  40 to 60     $ 244,211     $ (167,943

)

  $ 76,268  

Tradenames

   45 to 84       68,264       (45,901

)

    22,363  

Covenants not to compete

    36         6,761       (4,116

)

    2,645  

Technology

   24 to 40       9,188       (7,881

)

    1,307  

Totals

            $ 328,424     $ (225,841

)

  $ 102,583  

             

December 31, 2015

 
   

Estimated

useful lives

(months)

   

Gross

carrying

amount

   

Accumulated

amortization

   

Net

carrying

value

 

Amortizable intangible assets:

                                 

Customer relationships

  40 to 60     $ 263,293     $ (199,266

)

  $ 64,027  

Tradenames

   45 to 84       68,172       (52,354

)

    15,818  

Covenants not to compete

    36         10,254       (6,047

)

    4,207  

Technology

   24 to 40       9,014       (8,393

)

    621  

Totals

            $ 350,733     $ (266,060

)

  $ 84,673  

The aggregate intangible amortization expense was $57.0 million, $53.8 million and $48.7 million for the years ended December 31, 2013, 2014 and 2015, respectively. The estimated future amortization expense of intangible assets is as follows (in thousands):


   

Amount

 

Years ended December 31:

       

2016

  $ 41,461  

2017

    29,222  

2018

    10,147  

2019

    3,796  

2020

    47  

Total

  $ 84,673