Derivative Instruments and Hedging Activities (Details) (USD $) | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended |
In Thousands, unless otherwise specified | Jan. 30, 2015 | Aug. 01, 2014 | Jan. 30, 2015 | Jan. 31, 2014 | Jan. 31, 2014 |
Derivative [Line Items] | | | | | |
Company's credit spread (in hundredths) | 1.25% | | 1.25% | | |
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract] | | | | | |
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months | $4,802 | | $4,802 | | |
Current Interest Rate Swap Liability [Member] | | | | | |
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract] | | | | | |
Reduction in the fair value | 741 | 62 | | | |
Interest Rate Swap Aug 10, 2010 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 10-Aug-10 | | | | |
Effective date | 3-May-13 | | | | |
Term | 2 years | | | | |
Notional amount | 200,000 | | 200,000 | | |
Fixed rate (in hundredths) | 2.73% | | 2.73% | | |
Two Year Interest Rate Swap July 25, 2011 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 25-Jul-11 | | | | |
Effective date | 3-May-13 | | | | |
Term | 2 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 2.00% | | 2.00% | | |
Three Year Interest Rate Swap July 25, 2011 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 25-Jul-11 | | | | |
Effective date | 3-May-13 | | | | |
Term | 3 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 2.45% | | 2.45% | | |
Interest Rate Swap 1 September 19, 2011 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 19-Sep-11 | | | | |
Effective date | 3-May-13 | | | | |
Term | 2 years | | | | |
Notional amount | 25,000 | | 25,000 | | |
Fixed rate (in hundredths) | 1.05% | | 1.05% | | |
Interest Rate Swap 2 September 19, 2011 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 19-Sep-11 | | | | |
Effective date | 3-May-13 | | | | |
Term | 2 years | | | | |
Notional amount | 25,000 | | 25,000 | | |
Fixed rate (in hundredths) | 1.05% | | 1.05% | | |
Interest Rate Swap December 7, 2011 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 7-Dec-11 | | | | |
Effective date | 3-May-13 | | | | |
Term | 3 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 1.40% | | 1.40% | | |
Interest Rate Swap March 18, 2013 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 18-Mar-13 | | | | |
Effective date | 3-May-15 | | | | |
Term | 3 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 1.51% | | 1.51% | | |
Interest Rate Swap April 8, 2013 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 8-Apr-13 | | | | |
Effective date | 3-May-15 | | | | |
Term | 2 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 1.05% | | 1.05% | | |
Interest Rate Swap April 15, 2013 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 15-Apr-13 | | | | |
Effective date | 3-May-15 | | | | |
Term | 2 years | | | | |
Notional amount | 50,000 | | 50,000 | | |
Fixed rate (in hundredths) | 1.03% | | 1.03% | | |
Interest Rate Swap April 22, 2013 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 22-Apr-13 | | | | |
Effective date | 3-May-15 | | | | |
Term | 3 years | | | | |
Notional amount | 25,000 | | 25,000 | | |
Fixed rate (in hundredths) | 1.30% | | 1.30% | | |
Interest Rate Swap April 25, 2013 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 25-Apr-13 | | | | |
Effective date | 3-May-15 | | | | |
Term | 3 years | | | | |
Notional amount | 25,000 | | 25,000 | | |
Fixed rate (in hundredths) | 1.29% | | 1.29% | | |
Interest Rate Swap June 18, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 18-Jun-14 | | | | |
Effective date | 3-May-15 | | | | |
Term | 4 years | | | | |
Notional amount | 40,000 | | 40,000 | | |
Fixed rate (in hundredths) | 2.51% | | 2.51% | | |
Interest Rate Swap June 24, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 24-Jun-14 | | | | |
Effective date | 3-May-15 | | | | |
Term | 4 years | | | | |
Notional amount | 30,000 | | 30,000 | | |
Fixed rate (in hundredths) | 2.51% | | 2.51% | | |
Interest Rate Swap July 1, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 1-Jul-14 | | | | |
Effective date | 5-May-15 | | | | |
Term | 4 years | | | | |
Notional amount | 30,000 | | 30,000 | | |
Fixed rate (in hundredths) | 2.43% | | 2.43% | | |
Interest Rate Swap January 30, 2015 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 30-Jan-15 | | | | |
Effective date | 3-May-19 | | | | |
Term | 2 years | | | | |
Notional amount | 80,000 | | 80,000 | | |
Fixed rate (in hundredths) | 2.15% | | 2.15% | | |
Interest Rate Swap 1 January 30, 2015 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 30-Jan-15 | | | | |
Effective date | 3-May-19 | | | | |
Term | 2 years | | | | |
Notional amount | 60,000 | | 60,000 | | |
Fixed rate (in hundredths) | 2.16% | | 2.16% | | |
Interest Rate Swap 2 January 30, 2015 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 30-Jan-15 | | | | |
Effective date | 4-May-21 | | | | |
Term | 3 years | | | | |
Notional amount | 120,000 | | 120,000 | | |
Fixed rate (in hundredths) | 2.41% | | 2.41% | | |
Interest Rate Swap 3 January 30, 2015 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 30-Jan-15 | | | | |
Effective date | 3-May-19 | | | | |
Term | 2 years | | | | |
Notional amount | 60,000 | | 60,000 | | |
Fixed rate (in hundredths) | 2.15% | | 2.15% | | |
Interest Rate Swap 4 January 30, 2015 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Trade date | 30-Jan-15 | | | | |
Effective date | 4-May-21 | | | | |
Term | 3 years | | | | |
Notional amount | 80,000 | | 80,000 | | |
Fixed rate (in hundredths) | 2.40% | | 2.40% | | |
Interest Rate Swap [Member] | | | | | |
Derivatives, Fair Value [Line Items] | | | | | |
Fair value, assets | 0 | 240 | 0 | | |
Fair value, liability | 14,590 | 7,943 | 14,590 | | |
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract] | | | | | |
Gross Asset Amounts | 0 | 240 | 0 | | |
Liability Amount Offset | 0 | 0 | 0 | | |
Net Asset Amount Presented in the Balance Sheets | 0 | 240 | 0 | | |
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract] | | | | | |
Gross Liability Amounts | 14,590 | 8,441 | 14,590 | | |
Asset Amount Offset | 0 | -498 | 0 | | |
Net Liability Amount Presented in the Balance Sheets | 14,590 | 7,943 | 14,590 | | |
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | | | | | |
Derivative Instruments, Gain (Loss) [Line Items] | | | | | |
Amount of (Loss) Income Recognized in AOCL on Derivatives (Effective Portion) | 6,887 | 3,058 | | | |
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Interest Expense [Member] | | | | | |
Derivative Instruments, Gain (Loss) [Line Items] | | | | | |
Amount of Loss Reclassified from AOCL into Income (Effective Portion) | 4,016 | | 2,005 | 1,984 | 4,026 |
Interest Rate Swap [Member] | Other Assets [Member] | | | | | |
Derivatives, Fair Value [Line Items] | | | | | |
Fair value, assets | 0 | 240 | 0 | | |
Offsetting of derivative assets in condensed consolidated balance sheets [Abstract] | | | | | |
Net Asset Amount Presented in the Balance Sheets | 0 | 240 | 0 | | |
Interest Rate Swap [Member] | Current Interest Rate Swap Liability [Member] | | | | | |
Derivatives, Fair Value [Line Items] | | | | | |
Fair value, liability | 1,633 | 4,704 | 1,633 | | |
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract] | | | | | |
Net Liability Amount Presented in the Balance Sheets | 1,633 | 4,704 | 1,633 | | |
Interest Rate Swap [Member] | Long-term Interest Rate Swap Liability [Member] | | | | | |
Derivatives, Fair Value [Line Items] | | | | | |
Fair value, liability | 12,957 | 3,239 | 12,957 | | |
Offsetting of derivative liabilities in condensed consolidated balance sheets [Abstract] | | | | | |
Net Liability Amount Presented in the Balance Sheets | 12,957 | 3,239 | 12,957 | | |
Interest Rate Swap [Member] | Interest Rate Swap June 18, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Increase in notional amount each year | 40,000 | | 40,000 | | |
Maximum notional amount | 160,000 | | 160,000 | | |
Interest Rate Swap [Member] | Interest Rate Swap June 24, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Increase in notional amount each year | 30,000 | | 30,000 | | |
Maximum notional amount | 120,000 | | 120,000 | | |
Interest Rate Swap [Member] | Interest Rate Swap July 1, 2014 [Member] | | | | | |
Derivative [Line Items] | | | | | |
Increase in notional amount each year | 30,000 | | 30,000 | | |
Maximum notional amount | $120,000 | | $120,000 | | |