Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified		3 Months Ended	12 Months Ended	3 Months Ended																3 Months Ended	12 Months Ended	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2014 Current Interest Rate Swap Liability [Member]	Aug. 01, 2014 Current Interest Rate Swap Liability [Member]	Oct. 31, 2014 Interest Rate Swap Aug 10, 2010 [Member]	Oct. 31, 2014 Two Year Interest Rate Swap July 25, 2011 [Member]	Oct. 31, 2014 Three Year Interest Rate Swap July 25, 2011 [Member]	Oct. 31, 2014 Interest Rate Swap 1 September 19, 2011 [Member]	Oct. 31, 2014 Interest Rate Swap 2 September 19, 2011 [Member]	Oct. 31, 2014 Interest Rate Swap December 7, 2011 [Member]	Oct. 31, 2014 Interest Rate Swap March 18, 2013 [Member]	Oct. 31, 2014 Interest Rate Swap April 8, 2013 [Member]	Oct. 31, 2014 Interest Rate Swap April 15, 2013 [Member]	Oct. 31, 2014 Interest Rate Swap April 22, 2013 [Member]	Oct. 31, 2014 Interest Rate Swap April 25, 2013 [Member]	Oct. 31, 2014 Interest Rate Swap June 18, 2014 [Member]	Oct. 31, 2014 Interest Rate Swap June 24, 2014 [Member]	Oct. 31, 2014 Interest Rate Swap July 1, 2014 [Member]	Oct. 31, 2014 Interest Rate Swap [Member]	Aug. 01, 2014 Interest Rate Swap [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Aug. 01, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Nov. 01, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Other Assets [Member]	Aug. 01, 2014 Interest Rate Swap [Member] Other Assets [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Current Interest Rate Swap Liability [Member]	Aug. 01, 2014 Interest Rate Swap [Member] Current Interest Rate Swap Liability [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Long-term Interest Rate Swap Liability [Member]	Aug. 01, 2014 Interest Rate Swap [Member] Long-term Interest Rate Swap Liability [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Interest Rate Swap June 18, 2014 [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Interest Rate Swap June 24, 2014 [Member]	Oct. 31, 2014 Interest Rate Swap [Member] Interest Rate Swap July 1, 2014 [Member]
Derivative [Line Items]
Company's credit spread (in hundredths)	1.50%
Increase in notional amount each year																														$ 40,000	$ 30,000	$ 30,000
Maximum notional amount																														160,000	120,000	120,000
Trade date				Aug. 10, 2010	Jul. 25, 2011	Jul. 25, 2011	Sep. 19, 2011	Sep. 19, 2011	Dec. 07, 2011	Mar. 18, 2013	Apr. 08, 2013	Apr. 15, 2013	Apr. 22, 2013	Apr. 25, 2013	Jun. 18, 2014	Jun. 24, 2014	Jul. 01, 2014
Effective date				May 03, 2013	May 03, 2013	May 03, 2013	May 03, 2013	May 03, 2013	May 03, 2013	May 03, 2015	May 03, 2015	May 03, 2015	May 03, 2015	May 03, 2015	May 03, 2015	May 03, 2015	May 05, 2015
Term				2 years	2 years	3 years	2 years	2 years	3 years	3 years	2 years	2 years	3 years	3 years	4 years	4 years	4 years
Notional amount				200,000	50,000	50,000	25,000	25,000	50,000	50,000	50,000	50,000	25,000	25,000	40,000	30,000	30,000
Fixed rate (in hundredths)				2.73%	2.00%	2.45%	1.05%	1.05%	1.40%	1.51%	1.05%	1.03%	1.30%	1.29%	2.51%	2.51%	2.43%
Derivatives, Fair Value [Line Items]
Fair value, assets																		122	240					122	240
Fair value, liability																		8,600	7,943							3,212	4,704	5,388	3,239
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract]
Gross Asset Amounts																		122	240
Liability Amount Offset																		0	0
Net Asset Amount Presented in the Balance Sheets																		122	240					122	240
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Gross Liability Amounts																		8,747	8,441
Asset Amount Offset																		(147)	(498)
Net Liability Amount Presented in the Balance Sheets																		8,600	7,943							3,212	4,704	5,388	3,239
Reduction in the fair value		47	62
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months	5,501
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Income Recognized in AOCL on Derivatives (Effective Portion)																				(775)	3,058
Amount of Loss Reclassified from AOCL into Income (Effective Portion)																						$ 2,005	$ 2,041