INVENTORIES (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
INVENTORIES
Work in process and inventoried costs under long-term contracts	$ 80,918,000				$ 68,525,000
Materials and purchased parts	693,000				858,000
Customer advances	(21,865,000)				(27,288,000)
Net inventories	59,746,000	42,377,000	39,787,000	42,517,000	42,095,000	46,665,000	53,214,000	45,876,000
Costs incurred outside the scope of work or in advance of a contract award	5,800,000				1,900,000
General and administrative amounts for certain government contracts remaining in inventory	$ 7,100,000				$ 5,400,000