Investments (Tables)

12 Months Ended

Jan. 29, 2012

Investments [Abstract]

Summary Of Investments

	January 29, 2012						January 30, 2011
(in thousands)	Market Value		Adjusted Cost		Unrealized Gain		Market Value		Adjusted Cost		Unrealized Gain
Agency securities	$	26,132	$	26,110	$	22	$	54,747	$	54,658	$	89
Corporate issues		4,511		4,484		27		16,576		16,354		222
Bank time deposits		70,000		70,000		—		68,000		68,000		—
Total Investments	$	100,643	$	100,594	$	49	$	139,323	$	139,012	$	311

Schedule Of Investments, Classified By Maturity Period

	January 29, 2012				January 30, 2011
(in thousands)	Market Value		Adjusted Cost		Market Value		Adjusted Cost
Within 1 year	$	83,121	$	83,085	$	112,237	$	112,077
1 year through 5 years		17,522		17,509		27,086		26,935
Total Investments	$	100,643	$	100,594	$	139,323	$	139,012

Summary Of Unrealized Gains (Losses) On Investments

	Fiscal year ended
(in thousands)	January 29, 2012			January 30, 2011			January 31, 2010
Unrealized (loss) gain, net of tax	$	(204	)	$	(76	)	$	83
(Decrease) increase to deferred tax liability		(58	)		(41	)		26

Schedule Of Interest Income Generated From Investments

	Fiscal year ended
(in thousands)	January 29, 2012		January 30, 2011		January 31, 2010
Interest income	$	1,213	$	1,051		2,035