Equity Securities And Stock-Based Compensation (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012 item	Sep. 30, 2009 item
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	5,425
Weighted-average exercise price of outstanding options and other awards	$ 10.66
Shares remaining available for future issuance under existing equity compensation plans	3,660
Number of equity compensation plans	5	4
Number of approved equity compensation plans		3
Plans Approved By Stockholders
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	4,786
Weighted-average exercise price of outstanding options and other awards	$ 10.11
Shares remaining available for future issuance under existing equity compensation plans	3,660
Number of approved equity compensation plans	4	3
Plans Not Approved By Stockholders
Equity Securities and Stock-based Compensation
Maximum shares to be issued upon exercise of options and other awards	639
Weighted-average exercise price of outstanding options and other awards	$ 14.79
Shares remaining available for future issuance under existing equity compensation plans	0