Derivative Financial Instruments Designated as Cash Flow Hedges (Details) (USD $)	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Senior Notes 2023 [Member]
Derivative Cash Flow Hedge [Line Items]
Gain reclassified to interest expense on derivative financial instruments designated as cash flow hedges	$ 50,000		$ 100,000
Gain (loss) expected to be reclassified as interest expense on derivative financial instruments designated as cash flow hedges, over the next twelve months			200,000
Unamortized gain (loss) on interest rate lock			1,800,000
Senior Notes 2017 [Member]
Derivative Cash Flow Hedge [Line Items]
Gain (loss) expected to be reclassified as interest expense on derivative financial instruments designated as cash flow hedges, over the next twelve months			(200,000)
Unamortized gain (loss) on interest rate lock			(800,000)
Loss reclassified to interest expense on derivative financial instruments designated as cash flow hedges	$ 56,000	$ 100,000	$ 100,000	$ 200,000