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Derivative Instruments and Hedging Activities, Estimated Fair Values of Derivative Instruments (Details) - Interest Rate Swaps [Member] - USD ($)
$ in Thousands
Aug. 02, 2019
Aug. 03, 2018
Estimated Fair Value of Derivative Instruments [Abstract]    
Fair value, asset [1] $ 0 $ 6,255
Fair value, liability [1] 10,483 0
Prepaid Expenses and Other Current Assets [Member]    
Estimated Fair Value of Derivative Instruments [Abstract]    
Fair value, asset [1] 0 169
Other Assets [Member]    
Estimated Fair Value of Derivative Instruments [Abstract]    
Fair value, asset [1] 0 6,086
Long-term Interest Rate Swap Liability [Member]    
Estimated Fair Value of Derivative Instruments [Abstract]    
Fair value, liability [1] $ 10,483 $ 0
[1] These interest rate swap assets and liabilities are recorded at gross at both August 2, 2019 and August 3, 2018 since there were no offsetting assets and liabilities under the Company's master netting agreements.