Stockholders' Equity (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014	Oct. 31, 2014	Jan. 31, 2014	Jan. 31, 2013
Number of shares of common stock issued			0.9
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period			$ (82)
Other comprehensive loss before reclassifications			(590)
Amounts reclassified from accumulated other comprehensive loss			143
Other comprehensive income (loss)	$ (118)	$ (185)	(447)	$ 85
Balance at end of the period	(529)		$ (529)
Repurchase of common stock (in shares)			0.2	0.2
Repurchase of common stock			$ 10,400	$ 11,000
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			(374)
Amounts reclassified from accumulated other comprehensive loss			137
Other comprehensive income (loss)			(237)
Balance at end of the period	(22)		(22)
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			(216)
Amounts reclassified from accumulated other comprehensive loss			6
Other comprehensive income (loss)			(210)
Balance at end of the period	$ (507)		$ (507)
High end of range
Program Amount authorized to repurchase					$ 100,000	$ 100,000	$ 50,000