Stock-Based Compensation (Activity for Stock Option Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2014
Stock-Based Compensation
Number of options, beginning balance	4,947	4,423
Weighted Average Exercise Price Per Share, beginning balance	$ 27.23	$ 25.06
Options granted, Number of options	0	694
Options granted, Weighted Average Exercise Price Per Share		$ 40.99
Options exercised, Number of options	(197)	(354)
Options exercised, Weighted Average Exercise Price Per Share	$ 13.93	$ 19.39
Options forfeited, Number of options	(28)	(41)
Options forfeited, Weighted Average Exercise Price Per Share	$ 34.30	$ 34.75
Number of options, ending balance	4,722	4,722
Weighted Average Exercise Price Per Share, ending balance	$ 27.74	$ 27.74