Revenue (Schedule of Revenue Disaggregation by Product Category) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Disaggregation Of Revenue [Line Items]
Net sales	$ 268,221	$ 268,366	$ 522,031	$ 525,811
Non-Athletics [Member]
Disaggregation Of Revenue [Line Items]
Net sales	119,952	118,339	228,613	224,733
Non-Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	66,277	65,373	126,707	126,015
Non-Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	40,108	39,738	75,971	73,687
Non-Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	13,567	13,228	25,935	25,031
Athletics [Member]
Disaggregation Of Revenue [Line Items]
Net sales	135,571	137,816	269,380	277,824
Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	43,027	43,824	92,714	96,174
Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	56,837	58,225	110,141	113,845
Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	35,707	35,767	66,525	67,805
Accessories [Member]
Disaggregation Of Revenue [Line Items]
Net sales	12,056	11,580	22,599	21,937
Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 642	$ 631	$ 1,439	$ 1,317
Sales Revenue Net [Member] | Geographic Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Non-Athletics [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	45.00%	45.00%	44.00%	43.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Non-Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	25.00%	25.00%	24.00%	24.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Non-Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	15.00%	15.00%	15.00%	14.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Non-Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	5.00%	5.00%	5.00%	5.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Athletics [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	50.00%	51.00%	52.00%	53.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	16.00%	16.00%	18.00%	18.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	21.00%	22.00%	21.00%	22.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	13.00%	13.00%	13.00%	13.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Accessories [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	5.00%	4.00%	4.00%	4.00%
Sales Revenue Net [Member] | Geographic Concentration Risk [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%