Revenue (Schedule of Revenue Disaggregation by Product Category) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 274,579	$ 274,645	$ 722,868	$ 796,676
Non-Athletics [Member]
Disaggregation Of Revenue [Line Items]
Net sales	103,985	111,285	282,660	339,900
Non-Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	54,164	61,126	148,252	187,834
Non-Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	34,676	35,446	95,710	111,417
Non-Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	15,145	14,713	38,698	40,649
Athletics [Member]
Disaggregation Of Revenue [Line Items]
Net sales	153,952	148,935	399,308	418,315
Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	50,935	46,742	139,808	139,457
Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	59,355	56,112	163,757	166,253
Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Net sales	43,662	46,081	95,743	112,605
Accessories and Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 16,642	$ 14,425	$ 40,900	$ 38,461
Revenue Benchmark | Geographic Concentration Risk
Disaggregation Of Revenue [Line Items]
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Geographic Concentration Risk | Non-Athletics [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	38.00%	40.00%	39.00%	43.00%
Revenue Benchmark | Geographic Concentration Risk | Non-Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	20.00%	22.00%	21.00%	24.00%
Revenue Benchmark | Geographic Concentration Risk | Non-Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	13.00%	13.00%	13.00%	14.00%
Revenue Benchmark | Geographic Concentration Risk | Non-Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	5.00%	5.00%	5.00%	5.00%
Revenue Benchmark | Geographic Concentration Risk | Athletics [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	57.00%	54.00%	55.00%	53.00%
Revenue Benchmark | Geographic Concentration Risk | Athletics [Member] | Women' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	19.00%	17.00%	19.00%	18.00%
Revenue Benchmark | Geographic Concentration Risk | Athletics [Member] | Men' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	22.00%	20.00%	23.00%	21.00%
Revenue Benchmark | Geographic Concentration Risk | Athletics [Member] | Children' s [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	16.00%	17.00%	13.00%	14.00%
Revenue Benchmark | Geographic Concentration Risk | Accessories and Other [Member]
Disaggregation Of Revenue [Line Items]
Percentage of net sales	5.00%	6.00%	6.00%	4.00%