Fair Value of Financial Instruments (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Oct. 29, 2011	Jan. 29, 2011
Level I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 0	$ 0
Long-term investments	1,156	901
Total investments	1,156	901
Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Total investments	0	0
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Total investments	$ 0	$ 0