Stockholders' Equity (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014	Aug. 31, 2015	Oct. 31, 2014	Jan. 31, 2014	Jan. 31, 2013
Number of shares of common stock issued			1.0
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			$ 758,056
Other comprehensive income (loss)	$ (90)	$ 489	(537)	$ 574
Balance at end of the period	741,476		$ 741,476
Repurchase of common stock (in shares)			1.6	1.3
Repurchase of common stock			$ 71,400	$ 53,900
Unrealized Gain on Cash Flow Hedge
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			215
Other comprehensive loss before reclassifications			(672)
Amounts reclassified from accumulated other comprehensive loss			245
Other comprehensive income (loss)			(427)
Balance at end of the period	(212)		(212)
Net Unrealized Losses on Available-For-Sale Securities
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			(297)
Other comprehensive loss before reclassifications			(116)
Amounts reclassified from accumulated other comprehensive loss			6
Other comprehensive income (loss)			(110)
Balance at end of the period	(407)		(407)
Accumulated Other Comprehensive Loss
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			(82)
Other comprehensive loss before reclassifications			(788)
Amounts reclassified from accumulated other comprehensive loss			251
Other comprehensive income (loss)			(537)
Balance at end of the period	$ (619)		$ (619)
High end of range
Program Amount authorized to repurchase					$ 100,000	$ 100,000	$ 100,000	$ 50,000