Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified				6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended				6 Months Ended	12 Months Ended			6 Months Ended
	Jan. 31, 2014	Jan. 31, 2014 Interest Rate Swap [Member]	Aug. 02, 2013 Interest Rate Swap [Member]	Jan. 31, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Aug. 02, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jan. 31, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Feb. 01, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Jan. 31, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Feb. 01, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Jan. 31, 2014 Other assets [Member] Interest Rate Swap [Member]	Aug. 02, 2013 Other assets [Member] Interest Rate Swap [Member]	Jan. 31, 2014 Current interest rate swap liability [Member]	Aug. 02, 2013 Current interest rate swap liability [Member]	Jan. 31, 2014 Long-term interest rate swap liability [Member] Interest Rate Swap [Member]	Aug. 02, 2013 Long-term interest rate swap liability [Member] Interest Rate Swap [Member]	Jan. 31, 2014 Interest Rate Swap Aug 10, 2010 [Member]	Jan. 31, 2014 Two Year Interest Rate Swap July 25, 2011 [Member]	Jan. 31, 2014 Three Year Interest Rate Swap July 25, 2011 [Member]	Jan. 31, 2014 Interest Rate Swap 1 September 19, 2011 [Member]	Jan. 31, 2014 Interest Rate Swap 2 September 19, 2011 [Member]	Jan. 31, 2014 Interest Rate Swap December 7, 2011 [Member]	Jan. 31, 2014 Interest Rate Swap March 18, 2013 [Member]	Jan. 31, 2014 Interest Rate Swap April 8, 2013 [Member]	Jan. 31, 2014 Interest Rate Swap April 15, 2013 [Member]	Jan. 31, 2014 Interest Rate Swap April 22, 2013 [Member]	Jan. 31, 2014 Interest Rate Swap April 25, 2013 [Member]
Derivative [Line Items]
Company's credit spread (in hundredths)	1.50%
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
Term																2 years	2 years	3 years	2 years	2 years	3 years	3 years	2 years	2 years	3 years	3 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
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%
Derivatives, Fair Value [Line Items]
Fair value, assets		377	883							377	883
Fair value, liability		9,761	11,644											9,761	11,644
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract]
Gross Asset Amounts		611	1,159
Liability Amount Offset		(234)	(276)
Net Asset Amount Presented in the Balance Sheets		377	883							377	883
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Gross Liability Amounts		10,537	13,120
Asset Amount Offset		(776)	(1,476)
Net Liability Amount Presented in the Balance Sheets		9,761	11,644											9,761	11,644
Reduction in the fair value												23	123
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months	6,009
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Income Recognized in AOCL on Derivative (Effective Portion)				1,377	23,620
Amount of Loss Reclassified from AOCL into Income (Effective Portion)						$ 1,984	$ 7,030	$ 4,026	$ 7,030