CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net income	$ 37,207	$ 357,151
Adjustment for loss from discontinued operations	3,865	14
Income (loss) from continuing operations	41,072	357,165
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	283,646	288,480
Amortization of debt discount and debt issuance costs	558	187
Stock-based compensation	13,987	13,079
Pension settlement charge	1,454
Other	105	33
Income from asset sales	(7,273)	(7,028)
Deferred income tax expense	4,877	133,678
Change in assets and liabilities:
Accounts receivable	115,222	71,881
Inventories	(1,108)	(18,409)
Prepaid expenses and other	13,753	(12,631)
Accounts payable	(13,574)	3,259
Accrued liabilities	51,059	(47,620)
Deferred income taxes	2,580	20
Other noncurrent liabilities	(13,939)	34,488
Net cash provided by operating activities from continuing operations	492,419	816,582
Net cash provided by (used in) operating activities from discontinued operations	98	(14)
Net cash provided by operating activities	492,517	816,568
INVESTING ACTIVITIES:
Capital expenditures	(180,481)	(766,029)
Purchase of short-term investments	(21,869)
Proceeds from sales of short-term investments	21,676
Proceeds from asset sales	9,715	15,155
Net cash provided by (used in) investing activities	(170,959)	(750,874)
FINANCING ACTIVITIES:
Proceeds from senior notes, net of discount		497,125
Debt issuance costs	(32)	(4,334)
Net increase in bank overdraft		12,560
Proceeds on short-term debt		1,002
Payments on short-term debt		(1,002)
Dividends paid	(149,300)	(149,347)
Repurchase of common stock		(59,654)
Exercise of stock options, net of tax withholding	(199)	(1,079)
Tax withholdings related to net share settlements of restricted stock	(3,617)	(4,248)
Excess tax benefit from stock-based compensation	219	2,761
Net cash provided by (used in) financing activities	(152,929)	293,784
Net increase in cash and cash equivalents	168,629	359,478
Cash and cash equivalents, beginning of period	729,384	360,307
Cash and cash equivalents, end of period	$ 898,013	$ 719,785