Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Intangible asset amortization expense
Pre-tax amortization expense associated with intangible assets	$ 1.0	$ 1.2	$ 2.1	$ 2.5
Pre-tax amortization expense estimated for the remainder of fiscal year 2017	2.1		2.1
Pre-tax amortization expense estimated for fiscal year 2018	3.8		3.8
Pre-tax amortization expense estimated for fiscal year 2019	3.6		3.6
Pre-tax amortization expense estimated for fiscal year 2020	3.4		3.4
Pre-tax amortization expense estimated for fiscal year 2021	$ 3.3		$ 3.3