CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net income	$ 576,842	$ 423,930
Adjustment for (income) loss from discontinued operations	(15,186)	73
Income from continuing operations	561,656	424,003
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	336,822	272,404
Provision for bad debt	3,781	2
Stock-based compensation	17,471	13,300
Other	1,156	134
Gain on sale of investment securities	(162,121)
Income from asset sales	(14,538)	(14,365)
Deferred income tax expense	15,822	144,729
Change in assets and liabilities:
Accounts receivable	(5,697)	(143,809)
Inventories	(10,009)	(16,012)
Prepaid expenses and other	15,564	(41,287)
Accounts payable	(62,830)	(13,899)
Accrued liabilities	83,290	(7,768)
Deferred income taxes	(1,291)	(326)
Other noncurrent liabilities	(17,619)	(4,055)
Net cash provided by operating activities from continuing operations	761,457	613,051
Net cash provided by (used in) operating activities from discontinued operations	186	(73)
Net cash provided by operating activities	761,643	612,978
INVESTING ACTIVITIES:
Capital expenditures	(618,550)	(774,243)
Proceeds from sale of investment securities	232,221
Proceeds from asset sales	21,729	31,838
Net cash used in investing activities from continuing operations	(364,600)	(742,405)
Net cash provided by investing activities from discontinued operations	15,000
Net cash used in investing activities	(349,600)	(742,405)
FINANCING ACTIVITIES:
Repurchase of common stock		(71,404)
Increase in bank overdraft		3,955
Dividends paid	(39,519)	(22,620)
Exercise of stock options	6,118	2,374
Tax withholdings related to net share settlements of restricted stock	(1,677)	(1,514)
Excess tax benefit from stock-based compensation	7,420	3,256
Net cash used in financing activities	(27,658)	(85,953)
Net increase (decrease) in cash and cash equivalents	384,385	(215,380)
Cash and cash equivalents, beginning of period	96,095	364,246
Cash and cash equivalents, end of period	$ 480,480	$ 148,866