Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified				9 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended				9 Months Ended	12 Months Ended			9 Months Ended
	May 02, 2014	May 02, 2014 Interest Rate Swap [Member]	Aug. 02, 2013 Interest Rate Swap [Member]	May 02, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Aug. 02, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	May 02, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	May 03, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	May 02, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	May 03, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	May 02, 2014 Other assets [Member] Interest Rate Swap [Member]	Aug. 02, 2013 Other assets [Member] Interest Rate Swap [Member]	May 02, 2014 Current interest rate swap liability [Member]	Aug. 02, 2013 Current interest rate swap liability [Member]	May 02, 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]	May 02, 2014 Interest Rate Swap Aug 10, 2010 [Member]	May 02, 2014 Two Year Interest Rate Swap July 25, 2011 [Member]	May 02, 2014 Three Year Interest Rate Swap July 25, 2011 [Member]	May 02, 2014 Interest Rate Swap 1 September 19, 2011 [Member]	May 02, 2014 Interest Rate Swap 2 September 19, 2011 [Member]	May 02, 2014 Interest Rate Swap December 7, 2011 [Member]	May 02, 2014 Interest Rate Swap March 18, 2013 [Member]	May 02, 2014 Interest Rate Swap April 8, 2013 [Member]	May 02, 2014 Interest Rate Swap April 15, 2013 [Member]	May 02, 2014 Interest Rate Swap April 22, 2013 [Member]	May 02, 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		508	883							508	883
Fair value, liability		7,908	11,644											7,908	11,644
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract]
Gross Asset Amounts		708	1,159
Liability Amount Offset		(200)	(276)
Net Asset Amount Presented in the Balance Sheets		508	883							508	883
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract]
Gross Liability Amounts		8,839	13,120
Asset Amount Offset		(931)	(1,476)
Net Liability Amount Presented in the Balance Sheets		7,908	11,644											7,908	11,644
Reduction in the fair value												21	123
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months	6,109
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Income Recognized in AOCL on Derivative (Effective Portion)				3,361	23,620
Amount of Loss Reclassified from AOCL into Income (Effective Portion)						$ 2,007	$ 13,743	$ 6,033	$ 20,773