Share-Based Compensation Plans - Deferred Stock Units, Performance Units and Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Share-based compensation
Share-based compensation expense	$ 5.2	$ 4.2	$ 14.0	$ 12.6
2016 LTIP
Share-based compensation
Maximum number of common stock shares authorized for awards under the plan	6,400,000		6,400,000
Shares
Granted (in shares)			18,328
Non-Vested Deferred Stock Units and Restricted Stock Shares
Unrecognized compensation cost
Unrecognized compensation cost	$ 24.6		$ 24.6
Compensation recognition period			1 year 6 months
Deferred stock units
Additional information
Shares relinquished for tax withholding			71,896
Vesting period			3 years
Time-Based DSUs
Shares
Non-Vested at the beginning of the period (in shares)			478,106
Granted (in shares)			830,002
Vested (in shares)			(216,936)
Forfeited (in shares)			(24,426)
Non-Vested at the end of the period (in shares)	1,066,746		1,066,746
Weighted-Average Grant-Date Fair Value
Non-Vested at the beginning of the period (in dollars per share)			$ 49.60
Granted (in dollars per share)			16.68
Vested (in dollars per share)			49.01
Forfeited (in dollars per share)			39.49
Non-Vested at the end of the period (in dollars per share)	$ 24.34		$ 24.34
Time-Based DSUs | Awards granted prior to April 3, 2013
Shares
Non-Vested at the end of the period (in shares)	11,288		11,288
Performance-Based DSUs, including performance units
Shares
Non-Vested at the beginning of the period (in shares)			168,656
Granted (in shares)			258,168
Forfeited (in shares)			(59,943)
Non-Vested at the end of the period (in shares)	366,881		366,881
Weighted-Average Grant-Date Fair Value
Non-Vested at the beginning of the period (in dollars per share)			$ 47.87
Granted (in dollars per share)			17.43
Forfeited (in dollars per share)			33.72
Non-Vested at the end of the period (in dollars per share)	$ 28.76		$ 28.76
Performance units | Two year anniversary
Additional information
Vesting percentage			50.00%
Vesting period			2 years
Performance units | Three year anniversary
Additional information
Vesting percentage			50.00%
Vesting period			3 years
Restricted Stock
Shares
Non-Vested at the beginning of the period (in shares)			33,157
Granted (in shares)			18,646
Vested (in shares)			(6,951)
Non-Vested at the end of the period (in shares)	44,852		44,852
Weighted-Average Grant-Date Fair Value
Non-Vested at the beginning of the period (in dollars per share)			$ 27.93
Granted (in dollars per share)			17.37
Vested (in dollars per share)			58.44
Non-Vested at the end of the period (in dollars per share)	$ 18.81		$ 18.81