Fair Value (Assets and Liabilities at Fair Value) (Details) - USD ($)	May 05, 2018	Feb. 03, 2018
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, Noncurrent	$ 103,544,000	$ 102,784,000
Assets, Fair Value Disclosure [Abstract]
Money market funds	60,367,000	330,649,000
Derivative financial instruments	6,078,000	37,000
Total assets	169,989,000	433,470,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	1,166,000	9,147,000
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities, Fair Value Disclosure, Recurring	1,166,000	9,147,000
Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, Noncurrent	0	0
Assets, Fair Value Disclosure [Abstract]
Money market funds	60,367,000	330,649,000
Derivative financial instruments	0	0
Total assets	60,367,000	330,649,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	0	0
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities, Fair Value Disclosure, Recurring	0	0
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, Noncurrent	103,544,000	102,784,000
Assets, Fair Value Disclosure [Abstract]
Money market funds	0	0
Derivative financial instruments	6,078,000	37,000
Total assets	109,622,000	102,821,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	1,166,000	9,147,000
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities, Fair Value Disclosure, Recurring	1,166,000	9,147,000
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, Noncurrent	0	0
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	0
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities, Fair Value Disclosure, Recurring	0	0
Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross borrowings outstanding, carrying amount	253,250,000	253,250,000
Gross borrowings outstanding, fair value	254,516,000	253,250,000
ABL Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit facility, amount outstanding	$ 0	$ 0