Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income tax computed at statutory rate	$ 7,711	$ (2,406)	$ (12,479)
State income taxes, net of federal benefit	2,485	(172)	(684)
Decrease in valuation allowance - IRS Settlement	0	(26,846)	0
(Decrease)/Increase in valuation allowance - other (a)	(334,605)	3,023	11,729
Changes for uncertain tax positions	42	(14,276)	(1,909)
IRS interest refund	0	(1,714)	0
Other, net	(202)	594	(146)
Total	$ (324,569)	$ (41,797)	$ (3,489)