Income Taxes - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Line Items]
(Benefit from) provision for income taxes	$ (432,000)	$ 145,000	$ (1,028,000)	$ (36,438,000)
Accrued interest and penalties	2,500,000		2,500,000
Valuation allowance	(505,300,000)		(505,300,000)
Maximum
Income Tax Disclosure [Line Items]
Limit on operating loss carryforwards and recognition	11,400,000		11,400,000
Limit on operating loss carryforwards and recognition, tax-effected	4,000,000		4,000,000
Certain Components Likely To Be Subject To Annual Limitation [Member] | Maximum
Income Tax Disclosure [Line Items]
Deferred Tax Assets, Net	453,600,000		453,600,000
Certain Components Likely To Be Subject To Annual Limitation [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Deferred Tax Assets, Net	394,600,000		394,600,000
Subject To Annual Limitation [Member]
Income Tax Disclosure [Line Items]
Deferred Tax Assets, Gross	$ 87,400,000		$ 87,400,000