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Fair Value (Assets and Liabilities at Fair Value) (Details) - USD ($)
Apr. 30, 2016
Jan. 30, 2016
Fair Value, Measurements, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Money market funds $ 167,295,000 $ 311,349,000
Derivative financial instruments 538,000 4,166,000
Total assets 167,833,000 315,515,000
Liabilities, Fair Value Disclosure [Abstract]    
Derivative financial instruments 7,039,000  
Level 1 | Fair Value, Measurements, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Money market funds 167,295,000 311,349,000
Derivative financial instruments 0 0
Total assets 167,295,000 311,349,000
Liabilities, Fair Value Disclosure [Abstract]    
Derivative financial instruments 0  
Level 2 | Fair Value, Measurements, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Money market funds 0 0
Derivative financial instruments 538,000 4,166,000
Total assets 538,000 4,166,000
Liabilities, Fair Value Disclosure [Abstract]    
Derivative financial instruments 7,039,000 0
Level 3 | Fair Value, Measurements, Recurring    
Assets, Fair Value Disclosure [Abstract]    
Money market funds 0 0
Derivative financial instruments 0 0
Total assets 0 0
Liabilities, Fair Value Disclosure [Abstract]    
Derivative financial instruments 0  
Term Loan Facility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Gross borrowings outstanding, carrying amount 293,250,000 293,250,000
Gross borrowings outstanding, fair value 288,851,000 284,453,000
ABL Facility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility, amount outstanding $ 0 $ 0