Stockholders' Equity (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011	Jan. 31, 2013 Maximum	Apr. 30, 2012 Maximum	Oct. 31, 2011 Maximum	Jul. 31, 2010 Maximum	Oct. 31, 2009 Maximum
Value of common stock board of directors authorized to repurchase (in USD)				$ 50,000,000	$ 100,000,000	$ 50,000,000	$ 150,000,000	$ 150,000,000
Stock issuances under employee plans, net of shares withheld for taxes (in shares)	1,600,000
Shares withheld to satisfy employee tax obligation	300,000
Repurchases of common stock (in shares)	1,700,000	3,200,000	3,300,000
Repurchases of common stock	62,019,000	110,063,000	140,332,000
Components of accumulated other comprehensive loss, net of taxes
Unrealized Losses on Cash Flow Hedges, balance at beginning of period	(1,299,000)	(2,477,000)	(2,919,000)
Unrealized Losses on Cash Flow Hedges, period change	871,000	1,178,000	442,000
Unrealized Losses on Cash Flow Hedges, balance at end of period	(428,000)	(1,299,000)	(2,477,000)
Net Unrealized Losses on Available-For-Sale Securities, balance at beginning of period	(1,168,000)	(1,171,000)	(1,437,000)
Net Unrealized Losses on Available-For-Sale Securities, period change	650,000	3,000	266,000
Net Unrealized Losses on Available-For-Sale Securities, balance at end of period	(518,000)	(1,168,000)	(1,171,000)
Accumulated other comprehensive income (loss), balance at beginning of period	(2,467,000)	(3,648,000)	(4,356,000)
Other comprehensive income, period change	1,521,000	1,181,000	708,000
Accumulated other comprehensive income (loss), balance at end of period	(946,000)	(2,467,000)	(3,648,000)
Net changes to available-for-sale securities
Unrealized gains arising during the period, income tax (expense)/benefit	(350,000)	(1,000)	(143,000)
Net changes to cash flow hedges
Unrealized losses arising during the period, income tax (expense)/benefit	335,000	148,000	924,000
Reclassification for losses included in net income, income tax (expense)/benefit	(803,000)	(783,000)	(1,162,000)
Other comprehensive income, income tax (expense)/benefit	$ (818,000)	$ (636,000)	$ (381,000)