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Amortizable Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2011
Amortizable Intangible Assets  
Schedule of Amortizable Intangible Assets
    June 30, 2011     December 31, 2010  
(in thousands)   Gross
Carrying
Value
    Accumulated
Amortization
    Net
Carrying
Value
    Weighted
Average
Life
(years)
    Gross
Carrying
Value
    Accumulated
Amortization
    Net
Carrying
Value
    Weighted
Average
Life
(years)
 

Purchased customer accounts

  $ 841,873      $ (354,864   $ 487,009        14.9      $ 811,143      $ (330,627   $ 480,516        14.9   

Non-compete agreements

    25,108        (23,750     1,358        7.2        25,181        (23,797     1,384        7.3   
                                                   

Total

  $ 866,981      $ (378,614   $ 488,367        $ 836,324      $ (354,424   $ 481,900