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Goodwill and Intangible Assets Schedule of Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
The following tables summarize intangible assets:
 
 
 
December 31, 2012
 
December 31, 2011
 
 
 
Gross Intangibles
 
Accumulated Amortization
 
Net Intangibles
 
Gross Intangibles
 
Accumulated Amortization
 
Net Intangibles
 
Customer relationships
 
$
55,933

 
$
(23,120
)
 
$
32,813

 
$
49,308

 
$
(15,151
)
 
$
34,157

 
Trade names
 
2,707

 
(2,670
)
 
37

 
2,657

 
(2,657
)
 
—

 
Indefinite-lived trade names
 
3,120

 
—

 
3,120

 
3,120

 
—

 
3,120

 
Non-competes
 
8,711

 
(6,480
)
 
2,231

 
8,643

 
(5,177
)
 
3,466

 
Software
 
2,875

 
(2,875
)
 
—

 
2,875

 
(2,641
)
 
234

 
Total
 
$
73,346

 
$
(35,145
)
 
$
38,201

 
$
66,603

 
$
(25,626
)
 
$
40,977