INCOME TAXES (Details 2) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Deferred tax assets:
Accrued employee benefits	$ 11,642,000				$ 12,490,000				$ 11,642,000	$ 12,490,000
Long-term contracts and inventory valuation reductions	14,152,000				8,343,000				14,152,000	8,343,000
Allowances for loss contingencies	5,441,000				6,242,000				5,441,000	6,242,000
Deferred compensation	4,346,000				3,756,000				4,346,000	3,756,000
Property, plant and equipment	1,127,000				726,000				1,127,000	726,000
Intangible assets	477,000								477,000
Retirement benefits	5,678,000				14,549,000				5,678,000	14,549,000
State research and development credit carryforward	4,839,000				3,882,000				4,839,000	3,882,000
Net Operating Losses	18,639,000				11,291,000				18,639,000	11,291,000
Foreign currency mark-to-market	302,000				2,192,000				302,000	2,192,000
Other	1,746,000				313,000				1,746,000	313,000
Subtotal	68,389,000				63,784,000				68,389,000	63,784,000
Valuation allowance	(8,801,000)				(4,205,000)				(8,801,000)	(4,205,000)
Deferred tax assets	59,588,000				59,579,000				59,588,000	59,579,000
Deferred tax liabilities:
Intangible assets					8,608,000					8,608,000
Deferred revenue	28,865,000				25,277,000				28,865,000	25,277,000
State taxes	995,000				269,000				995,000	269,000
Foreign currency mark-to-market	290,000				146,000				290,000	146,000
Other	1,762,000				946,000				1,762,000	946,000
Deferred tax liabilities	31,912,000				35,246,000				31,912,000	35,246,000
Net deferred tax asset	27,676,000				24,333,000				27,676,000	24,333,000
Reclassification
Retirement benefits	5,678,000				14,549,000				5,678,000	14,549,000
Allowances for loss contingencies	5,441,000				6,242,000				5,441,000	6,242,000
Charge to income tax provision related to Australia	(5,935,000)	7,292,000	7,276,000	5,869,000	8,951,000	11,667,000	10,758,000	8,956,000	14,502,000	40,332,000	34,119,000
Foreign operating loss carryforwards	60,300,000								60,300,000
Unused state tax credits	10,900,000								10,900,000
Period of cumulative income or loss under assessment to determine if a valuation allowance is required									3 years
Period of historical cumulative loss									3 years
Foreign
Reclassification
Charge to income tax provision related to Australia	4,000,000
Adjustments
Reclassification
Charge to income tax provision related to Australia	(281,000)	(124,000)	233,000	469,000	306,000	329,000	911,000	603,000	297,000	2,149,000	1,746,000
Adjustments | Reclassification of accrued pension costs from accrued employee benefits
Deferred tax assets:
Retirement benefits	3,300,000								3,300,000
Reclassification
Retirement benefits	3,300,000								3,300,000
Adjustments | Reclassification of long-term contracts and inventory valuation reductions
Deferred tax assets:
Allowances for loss contingencies	700,000								700,000
Reclassification
Allowances for loss contingencies	$ 700,000								$ 700,000