Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013
ASSETS
Cash and cash equivalents	$ 132,326	$ 88,770
Accounts receivable	172,821	199,689
Income tax receivable	5,531	4,672
Inventories of materials and supplies	110,561	121,833
Prepaid expenses and deferred costs	30,721	38,796
Total current assets	451,960	453,760
Property and equipment, net	3,583,267	3,164,724
Other receivables	11,831	11,831
Deferred costs and other assets	31,661	26,951
Total assets	4,078,719	3,657,266
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	71,179	95,827
Accrued liabilities	17,578	17,653
Notes payable	2,025	8,071
Interest payable	19,404	7,945
Income tax payable	12,787	16,554
Deferred credits	21,714	10,822
Total current liabilities	144,687	156,872
LONG TERM LIABILITIES:
Long-term debt	1,602,961	1,263,232
Deferred income taxes	681	485
Deferred credits	5,356	1,176
Other	30,451	28,130
Total long-term liabilities	1,639,449	1,293,023
Commitments and contingencies (Note 9)
Shareholders’ equity:
Preferred stock, no par value, 1,000 shares authorized, none outstanding	0	0
Common stock, $1.00 par value, 90,000 shares authorized with 64,208 and 64,057 issued and outstanding at December 31, 2013 and September 30, 2013, respectively	64,208	64,057
Paid-in capital	187,416	183,390
Retained earnings	2,044,802	1,961,405
Accumulated other comprehensive loss	(1,843)	(1,481)
Total shareholders' equity	2,294,583	2,207,371
Total liabilities and shareholders' equity	$ 4,078,719	$ 3,657,266