CONSOLIDATED CONDENSED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Current assets:
Cash and cash equivalents	$ 584,979	$ 447,868
Accounts receivable, less reserve of $4,601 at March 31, 2014 and $4,795 September 30, 2013	624,108	621,420
Inventories	99,829	88,866
Deferred income taxes	13,998	16,414
Prepaid expenses and other	59,091	79,938
Current assets of discontinued operations	6,979	3,705
Total current assets	1,388,984	1,258,211
Investments	284,670	316,154
Property, plant and equipment, net	4,801,236	4,676,103
Other assets	13,391	14,359
Total assets	6,488,281	6,264,827
Current liabilities:
Accounts payable	135,300	144,379
Accrued liabilities	184,847	189,684
Long-term debt due within one year	115,000	115,000
Current liabilities of discontinued operations	3,341	3,210
Total current liabilities	438,488	452,273
Noncurrent liabilities:
Long-term debt	80,000	80,000
Deferred income taxes	1,220,624	1,222,981
Other	57,458	65,351
Noncurrent liabilities of discontinued operations	3,638	495
Total noncurrent liabilities	1,361,720	1,368,827
Shareholders' equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 110,323,930 shares and 108,738,577 shares issued as of March 31, 2014 and September 30, 2013, respectively and 108,065,638 shares and 106,716,970 shares outstanding as of March 31, 2014 and September 30, 2013, respectively	11,032	10,874
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued
Additional paid-in capital	359,995	288,758
Retained earnings	4,314,571	4,102,663
Accumulated other comprehensive income	113,425	132,530
Treasury stock, at cost	(110,950)	(91,098)
Total shareholders' equity	4,688,073	4,443,727
Total liabilities and shareholders' equity	$ 6,488,281	$ 6,264,827