Stock-Based Compensation Restricted Stock (Details) - Non-vested stock - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of conversion to common stock at the end of vesting period	one-for-one
Number of shares
Outstanding at January 30, 2016	894,526
Granted	1,396,947
Vested	(371,656)
Forfeited	(238,290)
Outstanding at October 29, 2016	1,681,527
Weighted average grant date fair value (in dollars per share)
Outstanding at beginning of period, weighted average grant date fair value (in dollars per share)	$ 20.20
Grants in period, weighted average grant date fair value (in dollars per share)	6.78	$ 20.65
Vested in period, weighted average grant date fair value (in dollars per share)	19.45
Forfeitures in period, weighted average grant date fair value (in dollars per share)	12.25
Outstanding at end of period, weighted average grant date fair value (in dollars per share)	$ 10.34
Aggregate intrinsic value
Aggregate intrinsic value, vested	$ 2.7	$ 5.4
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Shares issued in period	289,757
Minimum
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period	1 year
Maximum
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period	4 years