Line of Credit - Additional Information (Detail) (USD $)	9 Months Ended										0 Months Ended				0 Months Ended
	Jul. 31, 2014	Dec. 11, 2013	Oct. 31, 2013	Nov. 30, 2010	Jul. 31, 2014 Standby Letters of Credit	Oct. 31, 2013 Standby Letters of Credit	Jul. 31, 2014 Swing Line Loan	Oct. 31, 2013 Interest Rate Swap Agreements	Oct. 31, 2013 Interest Rate Swap Agreements Minimum	Oct. 31, 2013 Interest Rate Swap Agreements Maximum	Dec. 11, 2013 Second Amendment	Dec. 11, 2013 Second Amendment Minimum	Dec. 11, 2013 Second Amendment Maximum	Jul. 31, 2014 Second Amendment Maximum	Oct. 31, 2011 First Amendment [Member] Federal Funds Rate	Oct. 31, 2011 First Amendment [Member] One Month Eurodollar Rate	Oct. 31, 2011 First Amendment [Member] Base Rate Minimum	Oct. 31, 2011 First Amendment [Member] Base Rate Maximum	Oct. 31, 2011 First Amendment [Member] Eurodollar Minimum	Oct. 31, 2011 First Amendment [Member] Eurodollar Maximum
Line of Credit Facility
Line of credit, maximum borrowing capacity					$ 300,000,000.0		$ 50,000,000.0							$ 1,000,000,000
Line of Credit Facility, Current Borrowing Capacity		800,000,000		650,000,000
Line of credit facility, unused portion, commitment fee percentage, increase (decrease) in percentage											0.025%
Variable rate															0.50%	1.00%	0.00%	0.75%	1.00%	1.75%
Percentage of commitment fee on the unused portion of the Facility												0.20%	0.275%
Covenants maximum leverage ratio	3.25
Minimum fixed charge coverage ratio	1.50
Consolidated net worth	570,000,000.0
Consolidated net income earned	50.00%
Aggregate increases in stockholders' equity	100.00%
Credit facility, amount outstanding, cash borrowings	311,700,000		314,900,000
Standby letters of credit					115,100,000	100,600,000
Line of credit, borrowing capacity currently available	373,200,000		234,500,000
Notional amount								155,000,000
Derivative, fixed interest rate									0.44%	0.47%
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, effect gross			(200,000)
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, effect net of tax			$ (100,000)