Equity - Schedule of Stock-based Compensation Expense - by Award Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Expense:
Stock-based compensation expense	$ 1,275	$ 2,961	$ 5,997	$ 5,572
Employee Stock Option [Member]
Expense:
Stock-based compensation expense	232	2,224	2,367	3,945
Restricted stock awards and units [Member]
Expense:
Stock-based compensation expense	605	213	2,126	303
Employee Stock Purchase Plan [Member]
Expense:
Stock-based compensation expense	124	207	537	419
401(k) match in common stock [Member]
Expense:
Stock-based compensation expense	280	288	755	752
Outside director fees in common stock [Member]
Expense:
Stock-based compensation expense	$ 34	$ 29	$ 212	$ 153