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Defined Benefit Plans (Details)
$ in Thousands, SFr in Millions
 3 Months Ended 12 Months Ended
Apr. 30, 2016
USD ($)
participant
Apr. 30, 2016
CHF (SFr)
Aug. 01, 2015
USD ($)
May. 02, 2015
USD ($)
May. 02, 2015
CHF (SFr)
Jan. 30, 2016
USD ($)
Apr. 30, 2016
CHF (SFr)
participant
Jan. 30, 2016
CHF (SFr)
SERP                
Components of net periodic defined benefit pension cost                
Interest cost $ 460     $ 496        
Net amortization of unrecognized prior service credit 0     (58)        
Net amortization of actuarial losses 39     428        
Net periodic defined benefit pension cost $ 499     866        
Number of employees considered actively participating under the terms of the SERP | participant 0           0  
SERP benefit payments $ 400     400        
SERP | Executive Chairman of the Board and Chief Creative Officer                
Components of net periodic defined benefit pension cost                
Actuarial gain     $ 11,400     $ 11,400    
Curtailment gain     $ 1,700     1,700    
Swiss Pension Plan | Switzerland                
Components of net periodic defined benefit pension cost                
Net periodic defined benefit pension cost 400 SFr 0.4   500 SFr 0.4      
Projected benefit obligation 16,500         15,200 SFr 15.8 SFr 15.6
Plan assets at fair value 13,800         12,700 13.2 13.0
Other income/expense | SERP                
Components of net periodic defined benefit pension cost                
Gains as a result of changes in value of the insurance policy investments, included in other income 3,200     2,000        
Realized gain resulting from payout on insurance policy investments 100     $ 700        
Other assets | SERP                
Components of net periodic defined benefit pension cost                
Cash surrender values of the insurance policies held in a rabbi trust 55,600         52,500    
Accrued expenses and other long-term liabilities | SERP                
Components of net periodic defined benefit pension cost                
Projected benefit obligation 53,500         53,400    
Other long-term liabilities | Swiss Pension Plan | Switzerland                
Components of net periodic defined benefit pension cost                
Net liability $ 2,700         $ 2,500 SFr 2.6 SFr 2.6