Income Taxes - Narrative (Details) (USD $)	Jun. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Line Items]
Total deferred tax assets	$ 543,385,000
Deferred tax liabilities	(54,257,000)
Net deferred tax assets before valuation allowance	489,128,000
Valuation allowance	483,648,000	487,300,000
Net deferred tax assets	5,480,000
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority	26,000,000
Accrued interest and penalties	2,800,000	2,600,000
Limit on operating loss carryforwards and recognition	11,400,000
Limit on operating loss carryforwards and recognition, tax-effected	4,000,000
Maximum
Income Tax Disclosure [Line Items]
Limit on operating loss carryforwards and recognition	440,500,000
Limit on operating loss carryforwards and recognition, tax-effected	479,000,000
Certain Components Likely To Be Subject To Annual Limitation [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	69,779,000
Certain Components Likely To Be Subject To Annual Limitation [Member] | Maximum
Income Tax Disclosure [Line Items]
Net deferred tax assets	48,600,000
Certain Components Likely To Be Subject To Annual Limitation [Member] | Minimum
Income Tax Disclosure [Line Items]
Net deferred tax assets	10,200,000
Subject To Annual Limitation [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	102,207,000
Generally Not Subject to Annual Limitation [Member]
Income Tax Disclosure [Line Items]
Total deferred tax assets	$ 371,399,000