Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
ASSETS
Cash and cash equivalents	$ 59,635	$ 88,770
Accounts receivable, net of allowance for doubtful accounts of $679 and $0 at March 31, 2014 and September 30, 2013, respectively	238,569	199,689
Income tax receivable	6,215	4,672
Inventories of materials and supplies	124,416	121,833
Prepaid expenses and deferred costs	28,841	38,796
Total current assets	457,676	453,760
Property and equipment, net	3,575,172	3,164,724
Other receivables	11,831	11,831
Deferred costs and other assets	39,937	26,951
Deferred income taxes	518	0
Total assets	4,085,134	3,657,266
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	88,585	95,827
Accrued liabilities	16,319	17,653
Notes payable	0	8,071
Interest payable	8,278	7,945
Income tax payable	19,645	16,554
Deferred credits	12,653	10,822
Total current liabilities	145,480	156,872
LONG TERM LIABILITIES:
Long-term debt	1,512,685	1,263,232
Deferred income taxes	354	485
Deferred credits	12,305	1,176
Other	41,269	28,130
Total long-term liabilities	1,566,613	1,293,023
Commitments and contingencies (Note 11)
Shareholders’ equity:
Preferred stock, no par value, 1,000 shares authorized, none outstanding	0	0
Common stock, $1.00 par value, 180,000 shares authorized with 64,253 issued and outstanding at March 31, 2014 and 90,000 shares authorized with 64,057 issued and outstanding at September 30, 2013	64,253	64,057
Paid-in capital	192,570	183,390
Retained earnings	2,118,102	1,961,405
Accumulated other comprehensive loss	(1,884)	(1,481)
Total shareholders' equity	2,373,041	2,207,371
Total liabilities and shareholders' equity	$ 4,085,134	$ 3,657,266