Stock-Based Compensation (Stock Options Vested, Or Expected to Vest and Are Exercisable) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Stock-Based Compensation
Options outstanding, Number of options	4,615	4,722	4,423
Options outstanding, Weighted-Average Exercise Price	$ 27.86	$ 27.74	$ 25.06
Options outstanding, Weighted-Average Remaining Life in Years	5 years 8 months 12 days
Options outstanding, Aggregate Intrinsic Value	$ 103,020
Options vested and exercisable, Number of options	2,927
Options vested and exercisable, Weighted-Average Exercise Price Per Share	$ 23.85
Options vested and exercisable, Weighted-Average Remaining Life in Years	4 years 3 months 18 days
Options vested and exercisable, Aggregate Intrinsic Value	77,085
Options vested and expected to vest, Number of options	4,512
Options vested and expected to vest, Weighted-Average Exercise Price Per Share	$ 27.66
Options vested and to expected vest, Weighted-Average Remaining Life in Years	5 years 7 months 6 days
Options vested and expected to vest, Aggregate Intrinsic Value	$ 101,609