COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]
Costs incurred on uncompleted contracts	$ 292,922,503		$ 257,524,854
Estimated earnings	91,300,558		109,102,921
Sub-total	384,223,061		366,627,775
Less billings to date	274,521,658		258,374,784
Costs and estimated earnings in excess of billings on uncompleted contracts	109,701,403		108,252,991
Costs and estimated earnings in excess of billings on uncompleted contracts	110,011,430		108,909,844
Billings in excess of costs and estimated earnings on uncompleted contracts	(310,027)		(656,853)
Costs and estimated earnings in excess of billings on uncompleted contracts	109,701,403		108,252,991
Decrease in estimated gross profits on contracts due to revisions	1,377,000	600,000
U.S. Government [Member]
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]
Costs incurred on uncompleted contracts	246,341,518		214,888,101
Estimated earnings	65,879,081		85,320,636
Sub-total	312,220,599		300,208,737
Less billings to date	227,019,725		215,743,090
Costs and estimated earnings in excess of billings on uncompleted contracts	85,200,874		84,465,647
Costs and estimated earnings in excess of billings on uncompleted contracts	85,200,874		84,465,647
Commercial [Member]
Costs and Estimated Earnings on Uncompleted Contracts [Line Items]
Costs incurred on uncompleted contracts	46,580,985		42,636,753
Estimated earnings	25,421,477		23,782,285
Sub-total	72,002,462		66,419,038
Less billings to date	47,501,933		42,631,694
Costs and estimated earnings in excess of billings on uncompleted contracts	24,500,529		23,787,344
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 24,500,529		$ 23,787,344