Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Business Segment (Details)

v2.4.0.8
Summary of Significant Accounting Policies - Business Segment (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information [Line Items]        
Number of reportable segments     4  
Number of U.S. regions reported in aggregate     4  
Income before taxes and unallocated corporate expenses $ 3,353,990 $ 6,311,328    
All Other [Member]
        
Segment Reporting Information [Line Items]        
Number of U.S. regions reported in aggregate     4  
Income before taxes and unallocated corporate expenses     14,017,019 15,082,850
Unallocated Amount to Segment [Member]
        
Segment Reporting Information [Line Items]        
Unallocated Corporate Expense Segment 10,429,443 11,244,873    
Indirect expenses     $ 33,740,196 $ 33,899,622