Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOW FROM OPERATING ACTIVITIES:
Net income	$ 176,645	$ 198,747
Adjustments to reconcile net cash provided by operating activities:
Depreciation	46,419	27,991
Amortization of debt issuance costs	2,590	1,680
Amortization of deferred items	3,736	4,084
Provision for doubtful accounts	540	0
Provision for inventory obsolescence	615	495
Deferred income tax benefit	(513)	(817)
Share-based compensation expense	7,709	5,406
Other, net	1,137	(77)
Changes in assets and liabilities:
Decrease in accounts receivable	2,253	6,203
Decrease in income tax receivable	890	13,217
Increase in inventory	(15,200)	(4,150)
Decrease in prepaid expenses	6,186	11,989
Increase in deferred costs and other assets	(22,343)	(8,259)
Increase in accounts payable	20,467	2,146
Increase in accrued liabilities	2,356	1,340
Decrease in income tax payable	(4,859)	(20,250)
Increase in deferred credits and other liabilities	10,006	29,730
Net cash provided by operating activities	238,634	269,475
CASH FLOW FROM INVESTING ACTIVITIES:
Capital expenditures	(594,789)	(499,241)
Proceeds from sale of assets	7,513	115
Net cash used by investing activities	(587,276)	(499,126)
CASH FLOW FROM FINANCING ACTIVITIES:
Proceeds from issuance of bonds	450,000	0
Proceeds from credit facilities	135,000	225,000
Principal payments on credit facilities	(450,000)	(55,000)
Principal payments on notes payable	(5,461)	0
Proceeds from exercise of stock options	3,262	4,397
Debt issuance costs paid	(181)	(12,194)
Net cash provided by financing activities	132,620	162,203
NET DECREASE IN CASH AND CASH EQUIVALENTS	(216,022)	(67,448)
CASH AND CASH EQUIVALENTS, at beginning of period	295,002	180,523
CASH AND CASH EQUIVALENTS, at end of period	78,980	113,075
Non-cash activities
Decrease in accounts payable and accrued liabilities related to capital expenditures	$ (61,545)	$ (1,499)