CONSOLIDATED CONDENSED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 241,146	$ 96,095
Accounts receivable, less reserve of $944 at December 31, 2012 and $942 at September 30, 2012	580,173	620,489
Inventories	78,550	78,777
Deferred income taxes	23,218	17,555
Prepaid expenses and other	48,557	74,693
Current assets of discontinued operations	7,788	7,619
Total current assets	979,432	895,228
Investments	441,794	451,144
Property, plant and equipment, net	4,491,051	4,351,571
Other assets	22,011	23,142
Total assets	5,934,288	5,721,085
Current liabilities:
Accounts payable	107,553	159,420
Accrued liabilities	274,475	176,615
Long-term debt due within one year	40,000	40,000
Current liabilities of discontinued operations	5,205	5,129
Total current liabilities	427,233	381,164
Noncurrent liabilities:
Long-term debt	195,000	195,000
Deferred income taxes	1,226,216	1,209,040
Other	92,861	98,393
Noncurrent liabilities of discontinued operations	2,583	2,490
Total noncurrent liabilities	1,516,660	1,504,923
Shareholders' equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 108,262,523 shares and 107,598,889 shares issued as of December 31, 2012 and September 30, 2012, respectively and 106,240,916 and 105,697,693 shares outstanding as of December 31, 2012 and September 30, 2012, respectively	10,826	10,760
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued
Additional paid-in capital	254,689	236,240
Retained earnings	3,648,872	3,505,295
Accumulated other comprehensive income	167,106	166,807
Treasury stock, at cost	(91,098)	(84,104)
Total shareholders' equity	3,990,395	3,834,998
Total liabilities and shareholders' equity	$ 5,934,288	$ 5,721,085