Stockholders' Equity (Details) (USD $) Share data in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2010	Oct. 31, 2009	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Stockholders' Equity
Common stock issued during the period (in shares)					1.0
Shares withheld to satisfy employee tax obligation (in shares)					0.2
Value of common stock board of directors authorized to repurchase	$ 150,000,000	$ 150,000,000
Common stock repurchased (in shares)					0.6	2.2
Repurchases of common stock					24,000,000	100,300,000
Comprehensive Income
Net income			13,372,000	21,047,000	11,412,000	42,126,000
Net unrealized gains on available-for-sale securities, net of tax of $(205) and $(166) during the three months and $(49) and $(697) during the six months ended July 2, 2011 and July 3, 2010, respectively			381,000	308,000	91,000	1,294,000
Net unrealized gains (losses) on cash flow hedges, net of tax of $(24) and $65 during the three months and $(305) and $73 during the six months ended July 2, 2011 and July 3, 2010, respectively			44,000	(120,000)	565,000	(136,000)
Comprehensive income			13,797,000	21,235,000	12,068,000	43,284,000
Tax effect of net unrealized gains on available-for-sale securities			(205,000)	(166,000)	(49,000)	(697,000)
Tax effect of net unrealized gains (losses) on cash flow hedges			(24,000)	65,000	(305,000)	73,000
Components of accumulated other comprehensive loss, net of taxes
Unrealized Losses on Cash Flow Hedges, balance at beginning of period					(2,477,000)
Unrealized Losses on Cash Flow Hedges, Change associated with current period transactions, net of tax					(277,000)
Unrealized Losses on Cash Flow Hedges, Amount reclassified into earnings, net of tax					842,000
Unrealized Losses on Cash Flow Hedges, balance at end of period			(1,912,000)		(1,912,000)
Net Unrealized Losses on Available-For-Sale Securities, balance at beginning of period					(1,171,000)
Net Unrealized Losses on Available-For-Sale Securities, Change associated with current period transactions, net of tax					91,000
Net Unrealized Losses on Available-For-Sale Securities, balance at end of period			(1,080,000)		(1,080,000)
Accumulated other comprehensive income (loss), balance at beginning of period					(3,648,000)
Change associated with current period transactions, net of tax, total					(186,000)
Amount reclassified into earnings, net of tax, total					842,000
Accumulated other comprehensive income (loss), balance at end of period			$ (2,992,000)		$ (2,992,000)