Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Current Assets:
Cash and cash equivalents	$ 426,245	$ 347,943
Short-term investments	65,787	52,960
Accounts receivable, net of allowance of $4,699 and $9,927, respectively	302,194	495,602
Inventories of materials and supplies, net	113,034	149,653
Prepaid expenses and other	83,284	68,928
Total current assets	990,544	1,115,086
Investments	25,280	31,991
Property, plant and equipment, net	3,754,206	4,502,084
Other Noncurrent Assets:
Goodwill	45,653	82,786
Intangible assets, net	82,740	86,716
Operating lease right-of-use asset	47,534	0
Other assets	16,369	20,852
Total other noncurrent assets	192,296	190,354
Total assets	4,962,326	5,839,515
Current Liabilities:
Accounts payable	36,181	45,383
Dividends payable	27,244	77,763
Accrued liabilities	178,742	287,092
Total current liabilities	242,167	410,238
Noncurrent Liabilities:
Long-term debt, net	480,269	479,356
Deferred income taxes	685,589	806,611
Other	143,162	115,746
Noncurrent liabilities - discontinued operations	15,082	15,341
Total noncurrent liabilities	1,324,102	1,417,054
Commitments and Contingencies (Note 16)
Shareholders' Equity:
Common stock, $.10 par value, 160,000,000 shares authorized,112,151,563 and 112,080,262 shares issued as of June 30, 2020 and September 30, 2019, respectively, and 107,471,295 and 108,437,904 shares outstanding as of June 30, 2020 and September 30, 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	514,673	510,305
Retained earnings	3,096,168	3,714,307
Accumulated other comprehensive loss	(27,082)	(28,635)
Treasury stock, at cost, 4,680,268 shares and 3,642,358 shares as of June 30, 2020 and September 30, 2019, respectively	(198,917)	(194,962)
Total shareholders’ equity	3,396,057	4,012,223
Total liabilities and shareholders' equity	$ 4,962,326	$ 5,839,515