Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information (Details)

v2.4.0.6
Business Segment Information (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
segment
region
Sep. 30, 2011
Dec. 31, 2011
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 $ 6,370,389 $ 194,499 $ 15,261,663 $ 7,564,040  
Total revenue 163,906,205 227,803,568 474,579,479 539,705,280  
Interest income 4,392 90,652 13,469 273,885  
Interest expense 1,162,943 1,343,784 3,301,273 3,210,368  
Depreciation and amortization of intangible assets 4,738,264 4,022,951 14,446,767 9,555,286  
Income (loss) before taxes 9,455,118 15,048,776 18,737,801 34,820,723  
Total assets 681,699,498 788,433,613 681,699,498 788,433,613 645,597,467
Capital expenditures 12,925,369 17,700,674 31,166,814 34,228,199  
U.S Federal [Member]
          
Segment Reporting Information [Line Items]          
Total revenue 16,193,420 28,525,581 59,382,736 109,090,632  
Depreciation and amortization of intangible assets 85,664 47,112 220,721 160,624  
Income (loss) before taxes 2,319,011 2,393,199 5,577,321 16,379,811  
Total assets 157,420,358 250,568,886 157,420,358 250,568,886  
Capital expenditures 244,672 95,389 945,626 160,441  
Central U.S Region [Member]
          
Segment Reporting Information [Line Items]          
Total revenue 23,954,729 32,206,277 66,675,906 71,466,960  
Depreciation and amortization of intangible assets 4,955 (2,231) 14,996 13,590  
Income (loss) before taxes 2,822,955 4,326,876 7,319,844 5,016,384  
Total assets 21,676,637 20,482,833 21,676,637 20,482,833  
Capital expenditures   3,469   17,939  
Other U.S Regions [Member]
          
Segment Reporting Information [Line Items]          
Total revenue 67,335,319 96,496,756 183,083,818 185,531,536  
Income (loss) before taxes 9,040,364 17,116,611 28,213,926 31,824,515  
Total assets 278,036,272 309,664,125 278,036,272 309,664,125  
Capital expenditures 1,455,735 1,226,426 2,654,946 2,493,579  
Canada [Member]
          
Segment Reporting Information [Line Items]          
Total revenue 16,141,540 37,235,830 44,407,228 88,735,802  
Interest income 0 2 2,754 5,028  
Interest expense 264,254 172 503,979 2,097  
Depreciation and amortization of intangible assets 149,753 416,104 350,534 727,148  
Income (loss) before taxes 147,273 1,277,048 (3,735,331) 2,672,615  
Total assets 69,962,338 73,491,855 69,962,338 73,491,855  
Capital expenditures 1,281,673 833,666 3,587,951 2,749,326  
All Other [Member]
          
Segment Reporting Information [Line Items]          
Number of U.S. regions reported in aggregate     4    
Income before taxes and unallocated corporate expenses 6,370,389 194,499 15,261,663 7,564,040  
Total revenue 40,281,197 33,339,124 121,029,791 84,880,350  
Interest income 4,392 90,650 10,715 268,857  
Interest expense 898,689 1,343,612 2,797,294 3,208,271  
Depreciation and amortization of intangible assets 4,497,892 3,561,966 13,860,516 8,653,924  
Income (loss) before taxes (4,874,485) (10,064,958) (18,637,959) (21,072,602)  
Total assets 154,603,893 134,225,914 154,603,893 134,225,914  
Capital expenditures 9,943,289 15,541,724 23,978,291 28,806,914  
Unallocated Amount to Segment [Member]
          
Segment Reporting Information [Line Items]          
Unallocated corporate expenses $ 11,244,873 $ 10,259,457 $ 33,899,622 $ 28,636,642