CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
ASSETS
Cash	$ 474,313	$ 145,427
Accounts receivable, net	78,140	113,091
Income tax receivable	2,769	6,095
Inventories of materials and supplies, net	102,444	109,925
Prepaid expenses, deferred costs and other current assets	13,617	18,504
Total current assets	671,283	393,042
Property and equipment, net	4,137,741	4,127,696
Other receivables	11,831	11,831
Deferred income taxes	165	165
Deferred costs and other assets	7,174	7,058
Total assets	4,828,194	4,539,792
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	35,822	25,299
Accrued liabilities	11,034	7,868
Interest payable	13,571	7,096
Income tax payable	7,239	8,294
Deferred credits and other liabilities	8,663	799
Total current liabilities	76,329	49,356
Long-term debt	1,298,136	1,227,919
Deferred income taxes	1,815	1,202
Deferred credits	12,429	0
Other	39,663	30,929
Total long-term liabilities	1,352,043	1,260,050
Commitments and contingencies (Note 9)
Preferred stock, no par value, 1,000 shares authorized, none outstanding	0	0
Common stock, $1.00 par value, 180,000 shares authorized with 80,544 issued (Note 10) and outstanding as of June 30, 2017 and 180,000 shares authorized and 64,799 shares issued and outstanding as of September 30, 2016	80,544	64,799
Paid-in capital	413,831	237,542
Retained earnings	2,905,334	2,929,839
Accumulated other comprehensive loss	113	(1,794)
Total shareholders' equity	3,399,822	3,230,386
Total liabilities and shareholders' equity	$ 4,828,194	$ 4,539,792