Restatements (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2011
Changes in operating assets and liabilities:
Accrued payroll and related costs	$ 4,173	$ 6,979
Other accrued liabilities	14,344	4,840
Other long-term liabilities	(4,679)	992
Supplemental disclosure of cash flow information
Cash paid for interest	47,124	31,291
Accruals for Self-Insurance and Other Commitments and Contingencies
Current liability	154,577		154,167
Accounting Standards Update 2010-24 [Member]
Accruals for Self-Insurance and Other Commitments and Contingencies
Current liability			148,000
Total Liabilities			1,078,000
As Previously Reported [Member]
Changes in operating assets and liabilities:
Accrued payroll and related costs	(200)
Other accrued liabilities	14,658
Other long-term liabilities	(620)
Supplemental disclosure of cash flow information
Cash paid for interest	36,798
As Previously Reported [Member] | Accounting Standards Update 2010-24 [Member]
Accruals for Self-Insurance and Other Commitments and Contingencies
Current liability			190,300
Total Liabilities			1,120,200
Adjustment [Member]
Changes in operating assets and liabilities:
Accrued payroll and related costs	4,373
Other accrued liabilities	(314)
Other long-term liabilities	(4,059)
Supplemental disclosure of cash flow information
Cash paid for interest	10,326
Accruals for Self-Insurance and Other Commitments and Contingencies
Current liability			(42,300)
Total Liabilities			(42,200)
Adjustment [Member] | Accounting Standards Update 2010-24 [Member]
Accruals for Self-Insurance and Other Commitments and Contingencies
Current liability			(42,300)
Total Liabilities			$ (42,200)