Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Jul. 30, 2016	Jan. 30, 2016	Aug. 01, 2015
Cash equivalents - money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	$ 132,320	$ 100,694	$ 91,709
Cash equivalents - money market funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	132,320	100,694	91,709
Cash equivalents - money market funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0	0
Cash equivalents - money market funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	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	4,637	3,383	3,879
Non-qualified deferred compensation plan assets [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	4,637	3,383	3,879
Non-qualified deferred compensation plan assets [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0	0
Non-qualified deferred compensation plan assets [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0	0
Derivative financial instruments, net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value		154	713
Derivative financial instruments, net [Member] | Level 1 [Member]
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 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value		154	713
Derivative financial instruments, net [Member] | Level 3 [Member]
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	7,190	7,117	7,118
Secured convertible note [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0	0
Secured convertible note [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	0	0	0
Secured convertible note [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset, Fair Value	7,190	7,117	7,118
Non-qualified deferred compensation plan liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(4,637)	(3,383)	(3,879)
Non-qualified deferred compensation plan liabilities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(4,637)	(3,383)	(3,879)
Non-qualified deferred compensation plan liabilities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Non-qualified deferred compensation plan liabilities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	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	(1,705)	(1,728)	(2,423)
Deferred compensation plan liabilities for non-employee directors [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(1,705)	(1,728)	(2,423)
Deferred compensation plan liabilities for non-employee directors [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Deferred compensation plan liabilities for non-employee directors [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Restricted stock units for non-employee directors [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(9,060)	(8,879)	(10,263)
Restricted stock units for non-employee directors [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(9,060)	(8,879)	(10,263)
Restricted stock units for non-employee directors [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Restricted stock units for non-employee directors [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Performance share units
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(2,347)	(3,780)	(3,518)
Performance share units | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(2,347)	(3,780)	(3,518)
Performance share units | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	0	0
Performance share units | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0	$ 0	$ 0
Derivative financial instruments, net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(200)
Derivative financial instruments, net [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	0
Derivative financial instruments, net [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	(200)
Derivative financial instruments, net [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability, Fair Value	$ 0