Derivative Instruments and Hedging Activities, Pre-tax Effects of Derivative Instruments on AOCL and Income (Details) - Interest Rate Swaps [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2020	Feb. 01, 2019	Jan. 31, 2020	Feb. 01, 2019	Aug. 02, 2019
Interest Rate Cash Flow Hedges [Abstract]
Amount of loss recognized in AOCL on derivatives			$ (3,235)		$ (15,466)
Interest Expense [Member]
Interest Rate Cash Flow Hedges [Abstract]
Amount of loss reclassified from AOCL into income	$ 176	$ 141	$ 94	$ 141