Fair Value Measurements (Tables)

12 Months Ended

Jan. 28, 2012

Fair Value Measurements [Abstract]

Financial Assets Valued On A Recurring Or Non-Recurring Basis, Based On The Priority Of The Inputs To The Valuation Technique

	Balance as of January 28, 2012		Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Current Assets
Cash equivalents:
Money market accounts	$	3,793	$	3,793	$	–	$	–
Marketable securities:
Corporate bonds		73,107		–		73,107		–
Municipal securities		61,260		–		61,260		–
U.S. government securities		25,355		25,355		–		–
U.S. government agencies		23,648		–		23,648		–
Certificates of deposit		3,576		–		3,576		–
Commercial paper		1,988		–		1,988		–
Noncurrent Assets
Deferred compensation plan		4,146		4,146		–		–
Total	$	196,873	$	33,294	$	163,579	$	–

			Fair Value Measurements at Reporting Date Using
	Balance as of January 29, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Current Assets
Cash equivalents:
Money market accounts	$	5,397	$	5,397		$	$	–
Marketable securities:
Variable rate demand notes		319,220		–		319,220		–
Municipal securities		151,159		–		151,159		–
U.S. government securities		58,554		58,554		–		–
Corporate bonds		2,055		–		2,055		–
Asset-backed securities		3,031		–		3,031		–
Noncurrent Assets
Deferred compensation plan		4,143		4,143		–		–
Total	$	543,559	$	68,094	$	475,465	$	–