Share-Based Compensation Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	May 02, 2020	May 04, 2019
Share-based compensation
Share-based compensation expense	$ 2.0	$ 1.9
Number of Shares
Outstanding at the beginning of the period (in shares)	3,952,587
Forfeited (in shares)	(181,024)
Expired (in shares)	(77,509)
Outstanding at the end of the period (in shares)	3,694,054
Exercisable at the end of the period (in shares)	1,663,130
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 11.53
Forfeited (in dollars per share)	7.39
Expired (in dollars per share)	14.16
Outstanding at the end of the period (in dollars per share)	11.68
Exercisable at the end of the period (in dollars per share)	$ 16.19
Stock Appreciation Rights ("SARs")
Number of Shares
Outstanding at the beginning of the period (in shares)	414,476
Outstanding at the end of the period (in shares)	414,476
Exercisable at the end of the period (in shares)	138,158
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 7.62
Outstanding at the end of the period (in dollars per share)	7.62
Exercisable at the end of the period (in dollars per share)	$ 7.62
Stock Options And Stock Appreciation Rights ("SARs")
Unrecognized compensation cost
Unrecognized compensation cost, non-vested awards	$ 6.8
Compensation recognition period, non-vested awards	1 year 6 months