Stock-Based Compensation (Changes in Nonvested Stock Options) (Details) (Stock Options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011
Stock Options [Member]
Number of Options, beginning balance	1,368
Weighted-Average Exercise Price Per Share, beginning balance	$ 27.71
Options granted, Number of options	825
Options granted, Weighted-Average Exercise Price Per Share	$ 25.59
Options vested, Number of options	(472)
Options vested, Weighted-Average Exercise Price Per Share	$ 27.40
Options forfeited, Number of options	(8)
Options forfeited, Weighted-Average Exercise Price Per Share	$ 26.83
Number of Options, ending balance	1,713
Weighted-Average Exercise Price Per Share, ending balance	$ 26.80