Line Of Credit Facility - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended				9 Months Ended			9 Months Ended
	Jul. 31, 2012	Jul. 31, 2012 Unrealized Loss On Derivatives	Jul. 31, 2012 Swing Line Loan	Oct. 31, 2011 Swing Line Loan	Jul. 31, 2012 Forward starting swaps	Jul. 31, 2012 Interest Rate Swap	Oct. 31, 2011 Interest Rate Swap	Jul. 31, 2012 Five Year Syndicated Credit Facility
Line of Credit Facility [Line Items]
Syndicated line of credit, maximum capacity								$ 650.0
Syndicated line of credit facility, expiration date								Sep. 08, 2016
Syndicated line of credit, optional maximum capacity at any time prior to the expiration (subject to receipt of commitments for the increased amount from existing and new lenders)								850.0
Amount of sub-facilities								50.0
Letter Of Credit Facilities Maximum Borrowing Capacity								300.0
Description of covenants under the Facility	(1) a fixed charge coverage ratio; (2) a leverage ratio; and (3) a combined net worth test.
Line of credit, amount outstanding	252.0		2.0
Line of credit, borrowing capacity currently available	301.3		48.0	50.0
Weighted average interest rate on swing line credit facility			1.66%
Derivative agreement date					Oct. 19, 2010
Description of derivative agreement					The Company entered into a three-year forward starting interest rate swap agreement with an underlying notional amount of $25.0 million, pursuant to which the Company receives variable interest payments based on LIBOR and pays fixed interest at a rate of 0.89%. The effective date of this hedge was February 24, 2011. This swap is intended to hedge the interest risk associated with the Company's forecasted floating-rate, LIBOR-based debt.
Interest rate swap agreement period					3 years
Notional amount of derivatives					25.0
Derivative, fixed interest rate					0.89%
Derivative, effective date					Feb. 24, 2011
Fair value of interest rate swaps						0.2	0.3
Effective portion of cash flow hedges included in accumulated other comprehensive loss, before tax						0.2	0.3
Effective portion of cash flow hedges included in accumulated other comprehensive loss, net of tax						0.1	0.2
Unrealized net losses related to the interest rate swap contract		$ 0.2