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COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]      
Costs incurred on uncompleted contracts $ 338,769,266   $ 321,552,523
Estimated earnings 131,430,438   126,285,484
Sub-total 470,199,704   447,838,007
Less billings to date 351,173,849   335,517,041
Costs and estimated earnings in excess of billings on uncompleted contracts 119,025,855   112,320,966
Costs and estimated earnings in excess of billings on uncompleted contracts 119,205,553   112,597,136
Billings in excess of costs and estimated earnings on uncompleted contracts (179,698)   (276,170)
Costs and estimated earnings in excess of billings on uncompleted contracts 119,025,855   112,320,966
Decrease in estimated gross profits on contracts due to revisions 1,477,000 1,377,000  
U.S. Government [Member]
      
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]      
Costs incurred on uncompleted contracts 270,605,597   259,050,407
Estimated earnings 99,151,468   95,590,879
Sub-total 369,757,065   354,641,286
Less billings to date 281,858,400   272,783,120
Costs and estimated earnings in excess of billings on uncompleted contracts 87,898,665   81,858,166
Costs and estimated earnings in excess of billings on uncompleted contracts 87,898,665   81,858,166
Commercial [Member]
      
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]      
Costs incurred on uncompleted contracts 68,163,669   62,502,116
Estimated earnings 32,278,970   30,694,605
Sub-total 100,442,639   93,196,721
Less billings to date 69,315,449   62,733,921
Costs and estimated earnings in excess of billings on uncompleted contracts 31,127,190   30,462,800
Costs and estimated earnings in excess of billings on uncompleted contracts $ 31,127,190   $ 30,462,800