Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($)	Jan. 30, 2016	Jan. 31, 2015
Cash Equivalents - Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	$ 100,694,000	$ 35,533,000
Cash Equivalents - Money Market Funds [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	100,694,000	35,533,000
Cash Equivalents - Money Market Funds [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Cash Equivalents - Money Market Funds [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Non-Qualified Deferred Compensation Plan Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	3,383,000	2,904,000
Non-Qualified Deferred Compensation Plan Assets [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	3,383,000	2,904,000
Non-Qualified Deferred Compensation Plan Assets [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Non-Qualified Deferred Compensation Plan Assets [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Non-Qualified Deferred Compensation Plan Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(3,383,000)	(2,904,000)
Non-Qualified Deferred Compensation Plan Liabilities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(3,383,000)	(2,904,000)
Non-Qualified Deferred Compensation Plan Liabilities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Non-Qualified Deferred Compensation Plan Liabilities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Deferred Compensation Plan Liabilities For Non-Employee Directors [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(1,728,000)	(2,066,000)
Deferred Compensation Plan Liabilities For Non-Employee Directors [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(1,728,000)	(2,066,000)
Deferred Compensation Plan Liabilities For Non-Employee Directors [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Deferred Compensation Plan Liabilities For Non-Employee Directors [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Restricted Stock Units [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(8,879,000)	(8,857,000)
Restricted Stock Units [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(8,879,000)	(8,857,000)
Restricted Stock Units [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Restricted Stock Units [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Performance Share Units [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(3,780,000)	(5,147,000)
Performance Share Units [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(3,780,000)	(5,147,000)
Performance Share Units [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Performance Share Units [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0
Derivative Financial Instruments, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	154,000	79,000
Derivative Financial Instruments, Net [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Derivative Financial Instruments, Net [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	154,000	79,000
Derivative Financial Instruments, Net [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Secured Convertible Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	7,117,000	6,957,000
Secured Convertible Note [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Secured Convertible Note [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0
Secured Convertible Note [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	$ 7,117,000	$ 6,957,000