Equity Securities and Stock-Based Compensation (Details 4) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Employee and Nonemployee Stock Option
Equity Securities and Stock-based Compensation
Shares Outstanding, Beginning Balance	618	1,262	1,547
Shares, Granted	0	0	0
Shares Exercised	0	0	0
Shares, Forfeited or expired	(437)	(644)	(285)
Shares Outstanding, Ending Balance	181	618	1,262
Shares, Exercisable	181	618	1,262
Weighted-average exercise price, Beginning Balance	$ 27.42	$ 22.95	$ 21.68
Weighted-average exercise price, Granted	$ 0.00	$ 0.00	$ 0.00
Weighted-average exercise price, Exercised	$ 0.00	$ 0.00	$ 0.00
Weighted-average exercise price, Forfeited or expired	$ 26.28	$ 18.66	$ 17.02
Weighted-average exercise price, Ending Balance	$ 30.17	$ 27.42	$ 22.95
Weighted-average exercise price, Exercisable	$ 30.17	$ 27.42	$ 22.95
Weighted-average remaining contractual term, Outstanding Ending Balance	1 year	1 year 2 months 12 days	1 year 6 months
Weighted-average remaining contractual term, Exercisable	1 year	1 year 2 months 12 days	1 year 6 months
Aggregate intrinsic value, Outstanding	$ 0	$ 0	$ 0
Aggregate intrinsic value, Exercisable	0	0	0
Stock Appreciation Rights (SARs)
Equity Securities and Stock-based Compensation
Shares Outstanding, Beginning Balance	3,639	3,894	2,892
Shares, Granted	314	307	1,241
Shares Exercised	(146)	(322)	(8)
Shares, Forfeited or expired	(77)	(240)	(231)
Shares Outstanding, Ending Balance	3,730	3,639	3,894
Shares, Exercisable	3,418	3,027	2,909
Weighted-average exercise price, Beginning Balance	$ 7.25	$ 7.41	$ 10.08
Weighted-average exercise price, Granted	$ 9.19	$ 6.79	$ 1.85
Weighted-average exercise price, Exercised	$ 5.18	$ 4.51	$ 4.28
Weighted-average exercise price, Forfeited or expired	$ 16.15	$ 12.93	$ 11.12
Weighted-average exercise price, Ending Balance	$ 7.31	$ 7.25	$ 7.41
Weighted-average exercise price, Exercisable	$ 7.21	$ 8.01	$ 9.18
Weighted-average remaining contractual term, Outstanding Ending Balance	5 years 8 months 12 days	6 years 4 months 24 days	6 years 8 months 12 days
Weighted-average remaining contractual term, Exercisable	5 years 6 months	6 years	6 years
Aggregate intrinsic value, Outstanding	22,893,000	13,157,000	8,147,000
Aggregate intrinsic value, Exercisable	21,604,000	9,801,000	3,920,000
Weighted-average grant-date fair value of SARs granted	$ 4.40	$ 3.38	$ 0.86
Total intrinsic value	$ 1,100,000	$ 1,800,000	$ 0