Investments (Tables)

9 Months Ended

Oct. 30, 2011

Investments [Abstract]

Summary Of Investments

	October 30, 2011						January 30, 2011
(in thousands)	Market Value		Adjusted Cost		Unrealized Gain		Market Value		Adjusted Cost		Unrealized Gain
Agency securities	$	40,754	$	40,720	$	34	$	54,747	$	54,658	$	89
Corporate issues		13,566		13,501		65		16,576		16,354		222
Bank time deposits		80,000		80,000		—		68,000		68,000		—
Total investments	$	134,320	$	134,221	$	99	$	139,323	$	139,012	$	311

Summary Of Investment Maturities

	October 30, 2011				January 30, 2011
(in thousands)	Market Value		Adjusted Cost		Market Value		Adjusted Cost
Within 1 year	$	109,006	$	108,909	$	112,237	$	112,077
After 1 year through 5 years		25,314		25,312		27,086		26,935
Total investments	$	134,320	$	134,221	$	139,323	$	139,012

Summarizes Unrealized Gains (Losses) In Addition To The Tax Associated With These Comprehensive Income

	Three months ended						Nine months ended
(in thousands)	October 30, 2011			October 31, 2010			October 30, 2011			October 31, 2010
Unrealized (loss) gain, net of tax	$	(63	)	$	10		$	(164	)	$	36
Decrease to deferred tax liability		(19	)		(1	)		(48	)		(6	)

Summarizes Interest Income Generated From Investments And Cash And Cash Equivalents

	Three months ended				Nine months ended
(in thousands)	October 30, 2011		October 31, 2010		October 30, 2011		October 31, 2010
Interest income	$	337	$	242	$	917	$	693