Annual report pursuant to Section 13 and 15(d)

Business Segment Information (Details)

v2.4.0.8
Business Segment Information (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Revenues $ 176,134,000 $ 161,649,000 $ 126,253,000 $ 110,136,000 $ 156,591,000 $ 163,906,000 $ 164,100,000 $ 146,573,000 $ 574,171,249 $ 631,170,565 $ 728,200,318
Unallocated corporate activity                 2,758,868 24,606,886 44,180,105
Net income 1,574,000 4,545,000 (1,781,000) (1,924,000) 5,094,000 6,712,000 4,819,000 1,735,000 2,414,187 18,360,133 33,412,933
U.S Federal
                      
Segment Reporting Information [Line Items]                      
Revenues                 314,339,385 382,118,235 379,528,898
Interest income                 0 309 0
Interest expense                 0 0 0
Depreciation and amortization of intangible assets                 2,071,345 3,908,734 1,788,806
Unallocated corporate activity                 0    
Net income                 22,407,888 44,361,239 42,028,808
Central U.S Region
                      
Segment Reporting Information [Line Items]                      
Revenues                 70,451,614 73,469,139 145,198,723
Interest income                 0 121,747 0
Interest expense                 0 0 0
Depreciation and amortization of intangible assets                 1,053,387 991,083 225,620
Unallocated corporate activity                 0    
Net income                 6,430,448 2,263,079 19,251,539
Other U.S Regions
                      
Segment Reporting Information [Line Items]                      
Revenues                 68,797,187 60,563,724 110,210,632
Interest income                 45,837 7,898 15,785
Interest expense                 1,366,774 719,155 128,483
Depreciation and amortization of intangible assets                 1,687,232 1,133,356 835,739
Unallocated corporate activity                 0    
Net income                 (3,042,971) (4,178,699) 1,976,421
Canada
                      
Segment Reporting Information [Line Items]                      
Revenues                 40,388,023 37,978,732 35,440,522
Interest income                 65,334 1,410 2,106
Interest expense                 2,044,647 3,429,362 3,248,415
Depreciation and amortization of intangible assets                 10,478,221 9,033,370 9,096,725
Unallocated corporate activity                 0    
Net income                 4,364,975 2,030,936 424,351
All Other
                      
Segment Reporting Information [Line Items]                      
Revenues                 80,195,040 77,040,735 57,821,543
Interest income                 2,343 323 0
Interest expense                 58 36,120 107
Depreciation and amortization of intangible assets                 3,145,154 2,721,956 720,781
Unallocated corporate activity                 0    
Net income                 (1,281,961) 1,321,215 (712,608)
Consolidated Entities [Member]
                      
Segment Reporting Information [Line Items]                      
Revenues                 574,171,249 631,170,565 728,200,318
Interest income                 113,514 131,687 17,891
Interest expense                 3,411,479 4,184,637 3,377,005
Depreciation and amortization of intangible assets                 18,435,339 17,788,499 12,667,671
Unallocated corporate activity                 (26,119,511) (21,190,884) (18,788,406)
Net income                 $ 28,878,379 $ 45,797,770 $ 62,968,511
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
                      
Segment Reporting Information [Line Items]                      
Concentration risk percentage                 12.30% 11.60% 19.90%
Federal, State, Provincial and Local Government [Member]
                      
Segment Reporting Information [Line Items]                      
Concentration risk percentage                 80.00% 80.00%