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Share-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 29, 2019
$ / shares
shares
Jan. 29, 2018
$ / shares
shares
Mar. 31, 2019
USD ($)
tranche
$ / shares
shares
Mar. 31, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense, accelerated vesting due to a staffing reduction | $     $ 0.5 $ 0.4
Common shares available for issuance (in shares)     384,156  
General and Administrative Expense        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense | $     $ 3.9 $ 5.3
Restricted shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     4 years  
Number of equity awards granted (in shares) 112,359 125,409    
Granted shares value (in dollars per share) | $ / shares $ 31.77      
Exercise price (in dollars per share) | $ / shares   $ 29.78    
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
Number of tranches | tranche     2  
Granted shares value (in dollars per share) | $ / shares     $ 39.65  
Exercise price (in dollars per share) | $ / shares   $ 37.13    
RSUs | Vesting in three years        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percent     50.00%  
RSUs | Vesting in four years        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     1 year  
Vesting percent     50.00%  
RSUs at target        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of equity awards granted (in shares) 228,128 254,615    
RSUs at maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of equity awards granted (in shares) 568,609 634,628    
LTIP Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Conversion basis (in shares)     1  
Restricted shares and time-based LTIP Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated future compensation expense for unvested shares | $     $ 8.6  
Weighted average period over which compensation expense will be recorded     2 years 9 months 18 days  
RSUs and market-based LTIP units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated future compensation expense for unvested shares | $     $ 19.0  
Weighted average period over which compensation expense will be recorded     2 years 7 months 6 days