Business Organization and Summary of Significant Accounting Policies - Accounting for the Impairment of Long-lived Assets (Details) $ in Millions	12 Months Ended
	Feb. 03, 2018 USD ($) store	Jan. 28, 2017 USD ($) store	Jan. 30, 2016 USD ($)
Liability for Catastrophe Claims [Line Items]
Asset impairment charges	$ 6.0	$ 2.5	$ 1.4
Number of under-performing stores to close | store	150	150
Additional impairment charges			$ 12.5
Hurricane
Liability for Catastrophe Claims [Line Items]
Asset impairment charges	$ 2.9