Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Taxes
Tax benefit (provision) at U.S. statutory rate	$ (4,273)	$ 9,019	$ 46,936
State income taxes, net of federal tax effect	(1,934)	(1,717)	(968)
Valuation allowance	3,955	(8,913)	(45,310)
Unrecognized tax benefits	(1,245)	1,268	1,110
Other	(427)	(318)	(1,597)
Total income tax benefit (provision)	$ (3,924)	$ (661)	$ 171