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Defined Benefit Plans (Details)
$ in Thousands, SFr in Millions
 3 Months Ended 6 Months Ended
Aug. 01, 2015
USD ($)
participant
Aug. 01, 2015
CHF (SFr)
May. 02, 2015
USD ($)
Aug. 02, 2014
USD ($)
Aug. 01, 2015
USD ($)
participant
Aug. 01, 2015
CHF (SFr)
Aug. 02, 2014
USD ($)
Aug. 01, 2015
CHF (SFr)
participant
Jan. 31, 2015
USD ($)
Jan. 31, 2015
CHF (SFr)
Components of net periodic defined benefit pension (credit) cost                    
Actuarial gain $ 11,378     $ 0 $ 11,378   $ 0      
SERP                    
Components of net periodic defined benefit pension (credit) cost                    
Interest cost 495     572 991   1,144      
Net amortization of unrecognized prior service credit (39)     (58) (97)   (116)      
Net amortization of actuarial losses 290     235 718   469      
Curtailment gain (1,651)     0 (1,651)   0      
Net periodic defined benefit pension (credit) cost $ (905)     749 $ (39)   1,497      
Number of employees considered actively participating under the terms of the SERP | participant 0       0     0    
Actuarial gain $ 11,378       $ 11,378          
SERP benefit payments 400     300 800   300      
Swiss Pension Plan                    
Components of net periodic defined benefit pension (credit) cost                    
Net periodic defined benefit pension (credit) cost 500 SFr 0.4     900 SFr 0.9        
Projected benefit obligation 15,000       15,000     SFr 14.5 $ 15,100 SFr 13.9
Plan assets held at the independent fiduciary 12,500       12,500     12.1 12,500 11.5
Other income/expense | SERP                    
Components of net periodic defined benefit pension (credit) cost                    
Gain (loss) as a result of changes in value of the insurance policy investments, included in other income and expense (300)     $ 700 1,600   $ 2,200      
Realized gain resulting from payout on insurance policy investments     $ 700   700          
Other assets | SERP                    
Components of net periodic defined benefit pension (credit) cost                    
Cash surrender values of the insurance policies held in a rabbi trust 55,900       55,900       53,600  
Accrued expenses and other long-term liabilities | SERP                    
Components of net periodic defined benefit pension (credit) cost                    
Projected benefit obligation 50,600       50,600       61,900  
Other long-term liabilities | Swiss Pension Plan                    
Components of net periodic defined benefit pension (credit) cost                    
Net liability $ 2,500       $ 2,500     SFr 2.4 $ 2,600 SFr 2.4