Revenue (Schedule of Revenue Disaggregation by Product Category) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 257,445	$ 253,389
Percentage of net sales	100.00%	100.00%
Non-Athletics [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 106,394	$ 104,873
Percentage of net sales	42.00%	42.00%
Non-Athletics [Member] | Women' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 60,642	$ 60,119
Percentage of net sales	24.00%	24.00%
Non-Athletics [Member] | Men' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 33,949	$ 32,873
Percentage of net sales	13.00%	13.00%
Non-Athletics [Member] | Children' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 11,803	$ 11,881
Percentage of net sales	5.00%	5.00%
Athletics [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 140,009	$ 137,551
Percentage of net sales	54.00%	54.00%
Athletics [Member] | Women' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 52,350	$ 50,337
Percentage of net sales	20.00%	20.00%
Athletics [Member] | Men' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 55,621	$ 55,775
Percentage of net sales	22.00%	22.00%
Athletics [Member] | Children' s [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 32,038	$ 31,439
Percentage of net sales	12.00%	12.00%
Accessories [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 10,357	$ 10,063
Percentage of net sales	4.00%	4.00%
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 685	$ 902
Percentage of net sales