CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Current assets:
Cash and cash equivalents	$ 825,893	$ 905,561
Short-term investments	45,263	44,148
Accounts receivable, less reserve of $5,016 at December 31, 2016 and $2,696 at September 30, 2016	326,771	375,169
Inventories	126,082	124,325
Prepaid expenses and other	75,926	78,067
Assets held for sale	45,297	45,352
Current assets of discontinued operations	51	64
Total current assets	1,445,283	1,572,686
Investments	105,177	84,955
Property, plant and equipment, net	5,102,679	5,144,733
Other assets	24,498	29,645
Total assets	6,677,637	6,832,019
Current liabilities:
Accounts payable	111,638	95,422
Accrued liabilities	174,920	234,639
Current liabilities of discontinued operations	70	59
Total current liabilities	286,628	330,120
Noncurrent liabilities:
Long-term debt less unamortized discount and debt issuance costs	492,110	491,847
Deferred income taxes	1,332,269	1,342,456
Other	86,359	102,781
Noncurrent liabilities of discontinued operations	4,356	3,890
Total noncurrent liabilities	1,915,094	1,940,974
Shareholders' equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 111,876,237 shares and 111,400,339 shares issued as of December 31, 2016 and September 30, 2016, respectively and 108,562,523 shares and 108,077,916 shares outstanding as of December 31, 2016 and September 30, 2016, respectively	11,188	11,140
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued
Additional paid-in capital	463,859	448,452
Retained earnings	4,178,235	4,289,807
Accumulated other comprehensive income (loss)	12,574	(204)
Treasury stock, at cost	(189,941)	(188,270)
Total shareholders' equity	4,475,915	4,560,925
Total liabilities and shareholders' equity	$ 6,677,637	$ 6,832,019