Stockholders' Equity (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended			9 Months Ended		1 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Oct. 23, 2014	Sep. 27, 2014 Unrealized Gain on Cash Flow Hedge	Sep. 27, 2014 Net Unrealized Losses on Available-For-Sale Securities	Oct. 31, 2014 High end of range	Oct. 23, 2014 High end of range	Jan. 31, 2014 High end of range	Jan. 31, 2013 High end of range	Apr. 30, 2012 High end of range
Stockholders' Equity
Number of shares of common stock issued			1.0
Stockholders' Equity
Program Amount authorized to repurchase									$ 100,000,000	$ 100,000,000	$ 50,000,000	$ 100,000,000
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			(684,000)			333,000	(1,017,000)
Other comprehensive income (loss) before reclassifications			296,000			(282,000)	578,000
Amounts reclassified from accumulated other comprehensive loss			278,000			278,000
Other comprehensive income	489,000	148,000	574,000	165,000		(4,000)	578,000
Balance at end of the period	(110,000)		(110,000)			329,000	(439,000)
Repurchase of common stock (in shares)			1.3	0.2
Repurchase of common stock			53,900,000	7,800,000				100,000,000
Termination of remaining authorized share repurchase program					$ 35,600,000