Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
ASSETS
Cash	$ 115,669	$ 113,983
Accounts receivable, net	249,874	311,514
Income tax receivable	9,534	8,705
Inventories of materials and supplies, net	117,703	137,998
Prepaid expenses, deferred costs and other current assets	24,461	33,735
Total current assets	517,241	605,935
Property and equipment, net	4,208,091	4,172,132
Other receivables	11,831	11,831
Deferred income taxes	150	150
Deferred costs and other assets	11,133	11,285
Total assets	4,748,446	4,801,333
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	55,313	70,161
Accrued liabilities	20,528	23,572
Dividends payable	4,858	16,164
Interest payable	19,042	7,704
Income tax payable	13,264	13,906
Deferred credits and other liabilities	3,284	3,941
Total current liabilities	116,289	135,448
Long-term debt	1,608,399	1,678,268
Deferred income taxes	988	1,658
Deferred credits	309	800
Other	38,922	37,989
Total long-term liabilities	$ 1,648,618	$ 1,718,715
Commitments and contingencies
Preferred stock, no par value, 1,000 shares authorized, none outstanding	$ 0	$ 0
Common stock, $1.00 par value, 180,000 shares authorized with 64,768 issued and outstanding at December 31, 2015 and 180,000 shares authorized and 64,654 shares issued and outstanding at September 30, 2015	64,768	64,654
Paid-in capital	214,754	213,096
Retained earnings	2,704,219	2,670,148
Accumulated other comprehensive income	(202)	(728)
Total shareholders' equity	2,983,539	2,947,170
Total liabilities and shareholders' equity	$ 4,748,446	$ 4,801,333