Share-Based Compensation Restricted Stock (Details) - Non-vested stock - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Settlement at the end of vesting period	one-for-one to common stock
Number of shares
Outstanding at January 28, 2017	1,596,410
Granted	668,371
Vested	523,462
Forfeited	21,683
Outstanding at July 29, 2017	1,719,636
Weighted average grant date fair value (in dollars per share)
Outstanding at January 28, 2017, weighted average grant date fair value (in dollars per share)	$ 10.22
Grants in period, weighted average grant date fair value (in dollars per share)	2.21	$ 6.95
Vested in period, weighted average grant date fair value (in dollars per share)	11.56
Forfeitures in period, weighted average grant date fair value (in dollars per share)	9.66
Outstanding at July 29, 2017, weighted average grant date fair value (in dollars per share)	$ 6.70
Aggregate intrinsic value
Aggregate intrinsic value, vested	$ 1.1	$ 2.6
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Shares issued in period	425,597
Employees
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award annual vesting rights	25%
Award vesting period	4 years
Non-employee directors
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year