Stock-Based Compensation (Activity for Stock Option Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Stock-Based Compensation
Number of options, beginning balance	4,673	4,228
Weighted Average Exercise Price Per Share, beginning balance	$ 21.76	$ 20.12
Options granted, Number of options	4	849
Options granted, Weighted Average Exercise Price Per Share	$ 42.94	$ 26.10
Options exercised, Number of options	(28)	(418)
Options exercised, Weighted Average Exercise Price Per Share	$ 22.71	$ 13.52
Options forfeited, Number of options	(44)	(54)
Options forfeited, Weighted Average Exercise Price Per Share	$ 27.38	$ 27.23
Number of options, ending balance	4,605	4,605
Weighted Average Exercise Price Per Share, ending balance	$ 21.73	$ 21.73