Stock-Based Compensation (Changes in Nonvested Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2014
Options granted, Number of options	0	694
Stock Options [Member]
Number of Options, beginning balance	1,771	1,737
Weighted-Average Exercise Price Per Share, beginning balance	$ 34.75	$ 29.97
Options granted, Number of options	0	694
Options granted, Weighted-Average Exercise Price Per Share		$ 40.99
Options vested, Number of options	(36)	(683)
Options vested, Weighted-Average Exercise Price Per Share	$ 32.66	$ 28.82
Options forfeited, Number of options	(28)	(41)
Options forfeited, Weighted-Average Exercise Price Per Share	$ 34.30	$ 34.75
Number of Options, ending balance	1,707	1,707
Weighted-Average Exercise Price Per Share, ending balance	$ 34.80	$ 34.80