Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Goodwill (Details)

v2.4.0.6
Goodwill and Intangible Assets - Goodwill (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Goodwill [Roll Forward]  
Beginning balance $ 48,968,390
Foreign Currency Translation and Other Adjustments 490,046
Ending balance 50,379,564
U.S Federal [Member]
  
Goodwill [Roll Forward]  
Beginning balance 3,374,967
Foreign Currency Translation and Other Adjustments 0
Ending balance 3,374,967
Central U.S Region [Member]
  
Goodwill [Roll Forward]  
Beginning balance 1,972,415
Foreign Currency Translation and Other Adjustments 0
Ending balance 2,893,543
Other U.S Regions [Member]
  
Goodwill [Roll Forward]  
Beginning balance 21,736,140
Foreign Currency Translation and Other Adjustments 0
Ending balance 21,736,140
Canada [Member]
  
Goodwill [Roll Forward]  
Beginning balance 3,827,112
Foreign Currency Translation and Other Adjustments 490,046
Ending balance 4,317,158
All Other [Member]
  
Goodwill [Roll Forward]  
Beginning balance 18,057,756
Foreign Currency Translation and Other Adjustments 0
Ending balance 18,057,756
FAME [Member]
  
Goodwill [Line Items]  
Number of businesses acquired 1
Goodwill [Roll Forward]  
Beginning balance 1,886,945
Acquisitions 921,128
FAME [Member] | Central U.S Region [Member]
  
Goodwill [Roll Forward]  
Acquisitions 921,128
FAME [Member] | Canada [Member]
  
Goodwill [Roll Forward]  
Acquisitions $ 0