Self-Insurance - Additional Information (Detail) (USD $)	9 Months Ended				3 Months Ended
Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010	Jul. 31, 2011 Supported Insurance Claim Liabilities	Oct. 31, 2010 Supported Insurance Claim Liabilities	Jul. 31, 2011 Corporate
Other Liabilities [Line Items]
Self-insurance reserves	$ (12,032,000)	$ (3,006,000)				$ 1,100,000
Standby letters of credit	101,500,000		100,800,000
Restricted insurance deposits	35,860,000		36,164,000
Surety Bonds	$ 214,400,000		$ 112,500,000	$ 30,800,000	$ 29,300,000

Other Liabilities [Line Items]

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- Definition

The amount of letters issued by a bank to serve as a guarantee for payments made to a specified person under specified conditions. This amount decreases the available balance under the line of credit.

+ Details

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- Definition

The amount of bonds, as of the end of the accounting period, issued by a second party, guaranteeing the fulfillment of the Company's obligations to a third party. In the event that the Company does not meet its obligations, the third party will recover its losses via the bond.

+ Details

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- Definition

The increase (decrease) during the period in the carrying amount of accrued known and estimated losses incurred for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's' compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ Details

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- Definition

Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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