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Intangible Assets
9 Months Ended
Sep. 30, 2011
Intangible Assets [Abstract] 
Intangible Assets
 
(5)
Intangible Assets
 
The Company amortizes intangible assets on a straight line basis over their estimated useful lives as follows:
 
Trademarks
               1-10 years
Contracts - third party
                 7 years
Contracts - owned equipment
                 5-7 years
 
Total amortization expense was $0.3 million for the three months ended September 30, 2011 and 2010, and $1.0 million for the nine months ended September 30, 2011 and 2010. Intangible assets as of September 30, 2011 were as follows (in thousands):

 
 
Gross
Carrying
Amount
 
 
Accumulated
Amortization
 
 
Net Carrying
Amount
 
Trademarks
 
$
1,279
 
 
$
(671
)
 
$
608
 
Contracts - third party
 
 
3,650
 
 
 
(2,607
)
 
 
1,043
 
Contracts - owned equipment
 
 
4,012
 
 
 
(3,059
)
 
 
953
 
Intangible assets
 
$
8,941
 
 
$
(6,337
)
 
$
2,604