Stockholders' Equity RS Award Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2006 Two Thousand Six 1 [Member]	Sep. 30, 2007 Two Thousand Seven 1 [Member]	Sep. 30, 2006 Two Thousand Six [Member]	Sep. 30, 2007 Two Thousand Seven [Member]	Sep. 30, 2007 Two Thousand Seven [Member] Two Thousand Seven 1 [Member]	Sep. 30, 2008 Two Thousand Eight [Member]	Sep. 30, 2006 Two Thousand Eight [Member] Two Thousand Six 1 [Member]	Sep. 30, 2009 Two Thousand Nine [Member]	Sep. 30, 2010 Two Thousand Ten [Member]	Sep. 30, 2006 Two Thousand Ten [Member] Two Thousand Six 1 [Member]	Sep. 30, 2011 Two Thousand Eleven [Member]	Sep. 30, 2012 Two Thousand Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	107,500,000	320,000,000	225,486,000		25,000		384,850	20,000	4,000	101,650		185,100	225,486		320,000	107,500
Weighted Average Fair Value at Date of Grant					$ 17.36		$ 24.78	$ 25.08	$ 26.48	$ 19.17		$ 8.71	$ 3.64		$ 3.39	$ 2.07
Vested	(192,973,000)	(165,628,000)	(66,116,000)			4,000	258,347	20,000		85,750		146,400	59,347	25,000	87,579
Unvested shares forfeited	(32,901,000)	(130,258,000)	(38,000,000)				126,503			15,900		38,700	77,439		68,761
Share outstanding	257,826,000	376,200,000	352,086,000	230,716,000									88,700		163,660	107,500
Recognized compensation expense	$ 536					$ 106	$ 6,402	$ 502		$ 1,779	$ 434	$ 1,344	$ 495		$ 388	$ 50