Unaudited Condensed Consolidated Statement Of Changes In Shareholders' Equity - 9 months ended Jun. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance (in shares) at Sep. 30, 2014		64,362
Beginning Balance at Sep. 30, 2014	$ 2,555,524	$ 64,362	$ 201,464	$ 2,286,137	$ 3,561
Increase (Decrease) in Stockholders' Equity
Net income	281,879			281,879
Other comprehensive income	(396)				(396)
Dividends	(32,397)			(32,397)
Restricted stock awards (in shares)		223
Vesting of restricted stock and performance unit awards	(1,965)	$ (223)	(2,188)
Exercise of employee stock options (in shares)		68
Exercise of employee stock options	1,056	$ 68	988
Stock compensation expense	9,277		9,277
Ending Balance (in shares) at Jun. 30, 2015		64,653
Ending Balance at Jun. 30, 2015	$ 2,812,978	$ 64,653	$ 209,541	$ 2,535,619	$ 3,165