Debt (Details) (USD $)	3 Months Ended	9 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended				9 Months Ended
	Jul. 30, 2011	Jul. 30, 2011	Oct. 30, 2010	Jul. 30, 2011 Term Loan Facility [Member]	Dec. 22, 2010 Term Loan Facility [Member]	Jun. 30, 2009 5.0% Senior unsecured notes due July 1, 2014 [Member]	Jul. 30, 2011 5.0% Senior unsecured notes due July 1, 2014 [Member]	Apr. 30, 2011 3.0% Senior unsecured notes due April 15, 2016 [Member]	Jul. 30, 2011 3.0% Senior unsecured notes due April 15, 2016 [Member]	Jul. 30, 2011 Swap, Receivable [Member]	Apr. 30, 2011 Swap, Receivable [Member]	Jun. 30, 2009 Swap, Receivable [Member]	Jul. 30, 2011 Swap, Payable [Member]	Apr. 30, 2011 Swap, Payable [Member]	Jun. 30, 2009 Swap, Payable [Member]
Debt (Textuals) [Abstract]
Aggregate principal amount issued for notes					$ 145,000,000	$ 375,000,000		$ 375,000,000
Net proceeds of notes offering						370,400,000		370,500,000
Interest rate to be paid on long term notes						5.00%		3.00%
Maturity date of senior unsecured notes				Dec. 22, 2013			Jul. 01, 2014		Apr. 15, 2016
Term loan facility repayment terms		3-year principle amortization schedule with $3.6 million payable quarterly every March, June, September and December with the balance payable upon the maturity date
Term loan facility principle amortization schedule		3 years
Term loan facility quarterly interest payment		3,600,000
Short-term debt	14,500,000	14,500,000	0
Semi-annual fixed interest payments							Semi-annual fixed interest payments on January 1 and July 1 of each year commencing January 1, 2010		Semi-annual fixed interest payments on April 15 and October 15 of each year commencing October 15, 2011
Term loan facility, interest rate terms		The loan will bear interest at a fluctuating rate for each period equal to the annual rate applicable to that interest period plus 1.25% (1.50% as of July 30, 2011).
Debt instrument, interest rate over LIBOR rate		1.25%
Term loan facility interest rate	1.50%	1.50%
Term loan facility additional principal payment	17,500,000
Derivative [Line Items]
Interest rate to be paid on swap												5.00%
Notional amount of fixed rate debt											$ 375,000,000	$ 375,000,000		$ 375,000,000	$ 375,000,000
Floating interest rate													An annual three-month Libor plus 2.05%
Derivative instrument, interest rate LIBOR period		3 months
Derivative interest rate over LIBOR		2.05%
Number of installments										Paid in two installments on the 1st of every January and July, commencing January 1, 2010 through and ending on the maturity date			Payable in four installments on the 1st of every January, April, July and October, commencing on October 1, 2009 and ending on the maturity date
Interest rate													2.30%