Income and other Taxes - Other Disclosures (Details) (USD $)	3 Months Ended									12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2011	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount										$ 24,080,000	$ 0	$ 0
Income tax penalties and interest accrued	400,000				400,000					400,000	400,000
Proceeds from Equity Method Investment, Dividends or Distributions									14,800,000
Total income tax (benefit) expense	(24,080,000)	0	0	0	0	0	0	120,000	1,600,000	(24,080,000)	120,000	1,644,000
Operating Loss Carryforward, Portion Subject Limitation	247,300,000									247,300,000
Operating Loss Carryforward, Portion Not Subject Limitation	210,800,000									210,800,000
Incentive tax credits received										800,000	1,800,000	0
Foreign Income And Research And Development Credit
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	2,600,000									2,600,000
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforward, Decrease Related To Subsidiaries	57,400,000									57,400,000
Operating Loss Carryforwards	458,100,000									458,100,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	5,000,000									5,000,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	266,000,000									266,000,000
Spain And Netherlands | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Increase (Decrease) to Deferred Tax Assets, Operating Loss Carryforwards, Foreign	9,000,000									9,000,000
China | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforward, Expiration In Period										$ 4,100,000