Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Aug. 01, 2020	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net increase in retained earnings as a cumulative effect of adoption		$ 406,655	$ 395,761
Operating Lease, Liability		231,416		$ 251,700
Operating lease right-of-use assets		205,639	215,007	25,800
Capital Lease Obligations				2,600
Cash and cash equivalents		106,532	61,899
Credit and debit card receivables		$ 5,300	10,000
Credit and debit card receivable, settlement period, low end of range		3 days
Advertising expenses		$ 42,100	$ 40,000	$ 41,200
COVID-19 Impacts [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Percentage of stores opened	50.00%
Percentage of stores opened, effective date		early June
Adoption of Accounting Standards Codification 606
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		May 05, 2018
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true
Adoption of Accounting Standards Codification 606 | Cumulative Effect, Period of Adoption, Adjustment [Member] | Revision of Prior Period, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net increase in retained earnings as a cumulative effect of adoption		$ 620,000
Adoption of Accounting Standards Codification 842
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		May 04, 2019
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true