FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $)	12 Months Ended		0 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 14, 2012 NEK Special Programs Group LLC (NEK)	Sep. 30, 2013 NEK Special Programs Group LLC (NEK)	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Level 1	Sep. 30, 2012 Assets and liabilities measured at fair value on a recurring basis Level 1	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Level 2	Sep. 30, 2012 Assets and liabilities measured at fair value on a recurring basis Level 2	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Level 3	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Level 3 NEK Special Programs Group LLC (NEK)	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Total	Sep. 30, 2012 Assets and liabilities measured at fair value on a recurring basis Total	Sep. 30, 2013 Assets and liabilities measured at fair value on a recurring basis Total NEK Special Programs Group LLC (NEK)
Assets and liabilities measured at fair value on a recurring basis
Period within which contingent consideration will be paid			12 months
Change in fair value of contingent consideration since the date of the acquisition				$ 0
Assets
Cash equivalents					125,512,000	171,300,000					125,512,000	171,300,000
Marketable securities					4,055,000						4,055,000
Current derivative assets							1,597,000	3,779,000			1,597,000	3,779,000
Non-current derivative assets							6,096,000	3,713,000			6,096,000	3,713,000
Total assets measured at fair value					129,567,000	171,300,000	7,693,000	7,492,000			137,260,000	178,792,000
Liabilities
Current derivative liabilities							2,360,000	6,839,000			2,360,000	6,839,000
Non-current derivative liabilities							5,366,000	6,498,000			5,366,000	6,498,000
Contingent consideration to Seller of NEK				3,500,000						3,485,000			3,485,000
Total liabilities measured at fair value							7,726,000	13,337,000	3,485,000		11,211,000	13,337,000
Debt instruments
Fair Value	95,800,000	12,500,000
Carrying value	102,920,000	11,503,000
Change in the fair value of the contingent consideration	$ 0