Stockholders' Equity (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 4,787,000	$ 6,048,000
Accumulated Other Comprehensive Income (Loss) Net Transition Asset (Obligation)	47,000	115,000
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(2,091,000)	(2,241,000)
Accumulated other comprehensive income	9,121,000	2,399,000
Accumulated Other Comprehensive Income (Loss) Net Transition Asset (Obligation) Tax	148,000	119,000
Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Tax	470,000	323,000
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	0
Defined Benefit Plan, Future Amortization of Gain (Loss)	(110,000)
Defined Benefit Plan, Future Amortization of Transition Obligation (Asset)	(60,000)
SMIC
Schedule of Available-for-sale Securities [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	419,000	0
Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax	275,000	0
Nanya
Schedule of Available-for-sale Securities [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	5,959,000	(1,523,000)
Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Tax	$ 3,565,000	$ 312,000