CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Current assets:
Cash and cash equivalents	$ 907,032	$ 729,384
Short-term Investments	49,565	45,543
Accounts receivable, less reserve of $1,828 at June 30, 2016 and $6,181 at September 30, 2015	351,317	445,948
Inventories	128,885	128,541
Deferred income taxes		17,206
Prepaid expenses and other	79,021	64,475
Assets held for sale	21,772
Current assets of discontinued operations	80	8,097
Total current assets	1,537,672	1,439,194
Investments	99,898	104,354
Property, plant and equipment, net	5,306,434	5,563,170
Other assets	32,515	40,524
Total assets	6,976,519	7,147,242
Current liabilities:
Long-term debt due within one year less unamortized debt issuance costs	39,234	39,094
Accounts payable	92,692	108,169
Accrued liabilities	194,645	197,557
Current liabilities of discontinued operations	38	3,377
Total current liabilities	326,609	348,197
Noncurrent liabilities:
Long-term debt less unamortized discount and debt issuance costs	493,150	492,443
Deferred income taxes	1,358,093	1,295,916
Other	93,221	110,120
Noncurrent liabilities of discontinued operations	3,984	4,720
Total noncurrent liabilities	1,948,448	1,903,199
Shareholders' equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 111,383,982 shares and 110,987,546 shares issued as of June 30, 2016 and September 30, 2015, respectively and 108,063,579 shares and 107,767,915 shares outstanding as of June 30, 2016 and September 30, 2015, respectively	11,138	11,099
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued
Additional paid-in capital	442,883	420,141
Retained earnings	4,438,748	4,648,346
Accumulated other comprehensive loss	(3,156)	(1,377)
Treasury stock, at cost	188,151	182,363
Total shareholders' equity	4,701,462	4,895,846
Total liabilities and shareholders' equity	$ 6,976,519	$ 7,147,242