Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation Plans - Stock Options (Details)

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Share-Based Compensation Plans - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Nov. 02, 2019
Nov. 03, 2018
Nov. 02, 2019
Nov. 03, 2018
Share-based compensation        
Share-based compensation expense $ 3.2 $ 2.9 $ 7.5 $ 14.6
Stock Options        
Number of Shares        
Outstanding at the beginning of the period (in shares)     1,252,072  
Granted (in shares)     3,188,732  
Forfeited (in shares)     (209,921)  
Expired (in shares)     (56,584)  
Outstanding at the end of the period (in shares) 4,174,299   4,174,299  
Exercisable at the end of the period (in shares) 916,464   916,464  
Weighted-Average Exercise Price        
Outstanding at the beginning of the period (in dollars per share)     $ 23.64  
Granted (in dollars per share)     7.49  
Forfeited (in dollars per share)     10.52  
Expired (in dollars per share)     25.72  
Outstanding at the end of the period (in dollars per share) $ 11.94   11.94  
Exercisable at the end of the period (in dollars per share) $ 24.89   24.89  
Additional disclosures        
Weighted-average grant date fair value of stock options granted (in dollars per share)     $ 2.99  
Stock Appreciation Rights ("SARs")        
Number of Shares        
Granted (in shares)     414,476  
Outstanding at the end of the period (in shares) 414,476   414,476  
Weighted-Average Exercise Price        
Granted (in dollars per share)     $ 7.62  
Outstanding at the end of the period (in dollars per share) $ 7.62   7.62  
Additional disclosures        
Weighted-average grant date fair value of stock options granted (in dollars per share)     $ 3.01  
Assumptions used to value stock options        
Risk-free interest rate (as a percent)     2.36%  
Expected lives (in years)     5 years  
Dividend yield (as a percent)     4.17%  
Expected volatility (as a percent)     62.53%  
Stock Options And Stock Appreciation Rights ("SARs")        
Assumptions used to value stock options        
Dividend yield (as a percent)     0.00%  
Unrecognized compensation cost        
Unrecognized compensation cost, non-vested awards $ 9.8   $ 9.8  
Compensation recognition period, non-vested awards     1 year 7 months 6 days  
Chief Executive Officer        
Share-based compensation        
Share-based compensation expense   $ 0.7   $ 0.7