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Shareholders' Equity, Summary of Changes in AOCL, Net of Tax (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
May 01, 2015
May 02, 2014
May 01, 2015
May 02, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other comprehensive income, net of tax $ 4,937us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 1,218us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 706us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 2,065us-gaap_OtherComprehensiveIncomeLossNetOfTax
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCL, Beginning balance     (4,733)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
Other comprehensive income before reclassifications     4,426us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
Amounts reclassified from AOCL     (3,720)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
Other comprehensive income, net of tax     706us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
 
AOCL, Ending balance $ (4,027)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
  $ (4,027)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember