Unaudited Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 228,622	$ 248,331
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	107,376	86,412
Amortization of debt issuance costs and bond premium, net	3,389	3,083
Amortization of deferred items	2,487	1,227
Provision for doubtful accounts	679	3,510
Provision for inventory obsolescence	1,226	1,530
Deferred income tax benefit	(649)	(605)
Share-based compensation expense	10,924	10,418
Gain on sale of assets	(34,072)	0
Other, net	1,990	(67)
Changes in assets and liabilities:
Accounts receivable	(5,069)	(18,297)
Income tax receivable	(1,425)	(1,391)
Inventory	(8,816)	(22,065)
Prepaid expenses	14,100	12,788
Deferred costs and other assets	(10,512)	(9,519)
Accounts payable	(11,303)	(10,970)
Accrued liabilities	15,127	(6,745)
Bond premium	0	8,500
Income tax payable	6,032	6,311
Deferred credits and other liabilities	21,141	9,989
Net cash provided by operating activities	341,247	322,440
Cash flows from investing activities:
Capital expenditures	(564,119)	(569,696)
Proceeds from sale of assets	59,516	129
Net cash used in investing activities	(504,603)	(569,567)
Cash flows from financing activities:
Proceeds from issuance of bonds	0	200,000
Proceeds from bank credit facilities	370,000	400,000
Principal payments on bank credit facilities	(165,000)	(100,000)
Principal payments on notes payable	(8,071)	(5,148)
Repurchase and retirement of common shares	0	(107,260)
Proceeds from exercise of stock options	3,468	6,451
Debt issuance costs paid	(6,650)	(2,910)
Net cash provided by financing activities	193,747	391,133
Net increase in cash and cash equivalents	30,391	144,006
Cash and cash equivalents, at beginning of period	88,770	77,871
Cash and cash equivalents, at end of period	119,161	221,877
Non-cash activities:
Changes in accounts payable and accrued liabilities related to capital expenditures	$ (13,573)	$ (15,011)