Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Current Assets:
Cash and cash equivalents	$ 487,884	$ 347,943
Short-term investments	89,335	52,960
Accounts receivable, net of allowance of $1,820 and $9,927, respectively	192,623	495,602
Inventories of materials and supplies, net	104,180	149,653
Prepaid expenses and other	89,305	68,928
Total current assets	963,327	1,115,086
Investments	31,585	31,991
Property, plant and equipment, net	3,646,341	4,502,084
Other Noncurrent Assets:
Goodwill	45,653	82,786
Intangible assets, net	81,027	86,716
Operating lease right-of-use asset	44,583
Other assets	17,105	20,852
Total other noncurrent assets	188,368	190,354
Total assets	4,829,621	5,839,515
Current Liabilities:
Accounts payable	36,468	45,383
Dividends payable	27,226	77,763
Accrued liabilities	155,442	287,092
Total current liabilities	219,136	410,238
Noncurrent Liabilities:
Long-term debt, net	480,727	479,356
Deferred income taxes	650,675	806,611
Other	147,180	115,746
Noncurrent liabilities - discontinued operations	13,389	15,341
Total noncurrent liabilities	1,291,971	1,417,054
Commitments and Contingencies (Note 17)
Shareholders' Equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 112,151,563 and 112,080,262 shares issued as of September 30, 2020 and 2019, respectively, and 107,488,242 and 108,437,904 shares outstanding as of September 30, 2020 and 2019, respectively	11,215	11,208
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued	0	0
Additional paid-in capital	521,628	510,305
Retained earnings	3,010,012	3,714,307
Accumulated other comprehensive loss	(26,188)	(28,635)
Treasury stock, at cost, 4,663,321 shares and 3,642,358 shares as of September 30, 2020 and 2019, respectively	(198,153)	(194,962)
Total shareholders’ equity	3,318,514	4,012,223
Total liabilities and shareholders' equity	$ 4,829,621	$ 5,839,515