Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 108,341	$ 77,871
Accounts receivable, net of allowance for doubtful accounts of $1,871 and $0 at December 31, 2012 and September 30, 2012, respectively	142,934	167,186
Income tax receivable	5,609	5,750
Inventories of materials and supplies	80,367	80,290
Prepaid expenses and deferred costs	31,117	39,437
Total current assets	368,368	370,534
Property and equipment, net	2,854,515	2,537,340
Other receivables	11,868	11,875
Deferred costs and other assets	24,195	24,013
Total assets	3,258,946	2,943,762
Current liabilities:
Accounts payable	78,420	83,592
Accrued liabilities	29,261	24,478
Notes payable	0	5,148
Income tax payable	13,314	9,711
Deferred credits	15,095	13,738
Total current liabilities	136,090	136,667
LONG TERM LIABILITIES:
Long-term debt	1,070,000	830,000
Deferred income taxes	8,571	8,791
Deferred credits	7,659	8,928
Other	20,300	19,954
Total long-term liabilities	1,106,530	867,673
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 65,632 and 65,452 issued and outstanding at December 31, 2012 and September 30, 2012, respectively	65,632	65,452
Paid-in capital	164,061	160,540
Retained earnings	1,789,272	1,716,441
Accumulated other comprehensive loss	(2,639)	(3,011)
Total shareholders' equity	2,016,326	1,939,422
Total liabilities and shareholders' equity	$ 3,258,946	$ 2,943,762