Equity-Based Compensation (Schedule Of Stock Appreciation Rights Activity) (Details) - Stock Appreciation Rights (SARs) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
SARs, Outstanding, Beginning of period | shares	1,467,219
SARs, Granted | shares	176,000
SARs, Exercised | shares	(463,926)
SARs, Expired | shares	(6,002)
SARs, Forfeited | shares	(4,999)
SARs, Outstanding, End of period | shares	1,168,292
SARs, Exercisable | shares	863,358
SARs, Weighted Average Exercise Price, Beginning of period | $ / shares	$ 47.97
SARs, Weighted Average Exercise Price, Granted | $ / shares	71.65
SARs, Weighted Average Exercise Price, Exercised | $ / shares	41.36
SARs, Weighted Average Exercise Price, Expired | $ / shares	74.38
SARs, Weighted Average Exercise Price, Forfeited | $ / shares	70.94
SARs, Weighted Average Exercise Price, End of period | $ / shares	53.93
SARs, Weighted Average Exercise Price, Exercisable | $ / shares	$ 48.34
SARs, Weighted Average Remaining Contractual Terms, Outstanding	5 years 7 months
SARs, Weighted Average Remaining Contractual Terms, Exercisable	4 years 7 months
SARs, Aggregate Intrinsic Value, Outstanding | $	$ 34,381
SARs, Aggregate Intrinsic Value, Exercisable | $	$ 30,280