Equity (Schedule of Stock-based Compensation Expense - by Award Type) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Expense:
Stock-based compensation expense	$ 1,082	$ 2,180
Employee stock options
Expense:
Stock-based compensation expense	258	1,047
Restricted stock awards and units
Expense:
Stock-based compensation expense	406	575
Employee stock purchase plan
Expense:
Stock-based compensation expense	131	224
401(k) match in common stock
Expense:
Stock-based compensation expense	256	230
Outside director fees in common stock
Expense:
Stock-based compensation expense	$ 31	$ 104