Savings Plan (Details) - Savings Plan - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Savings Plan
Employee contribution limit per calendar year (as a percent of compensation)	100.00%
Employer contribution limit (as a percent of compensation)	3.00%
Company's contributions to the savings plan	$ 1.2	$ 1.3	$ 1.3