Stockholders' Equity (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Oct. 31, 2014	Jan. 31, 2014	Jan. 31, 2013	Apr. 30, 2012	Oct. 31, 2011
Stockholders' Equity
Number of shares of common stock issued	1.1
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period	$ (684)	$ (946)	$ (2,467)
Other comprehensive income (loss) before reclassifications	200	49	29
Amounts reclassified from accumulated other comprehensive loss	402	213	1,492
Other comprehensive income	602	262	1,521
Balance at end of the period	(82)	(684)	(946)
Repurchase of common stock	71,676	26,022	62,019
Unrealized Gain on Cash Flow Hedge
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period	333	(428)	(1,299)
Other comprehensive income (loss) before reclassifications	(520)	397	(621)
Amounts reclassified from accumulated other comprehensive loss	402	364	1,492
Other comprehensive income	(118)	761	871
Balance at end of the period	215	333	(428)
Net Unrealized Losses on Available-For-Sale Securities
Components of accumulated other comprehensive loss, net of taxes
Balance at beginning of the period	(1,017)	(518)	(1,168)
Other comprehensive income (loss) before reclassifications	720	(348)	650
Amounts reclassified from accumulated other comprehensive loss		(151)
Other comprehensive income	720	(499)	650
Balance at end of the period	(297)	(1,017)	(518)
High end of range
Stockholders' Equity
Program Amount authorized to repurchase				$ 100,000	$ 100,000	$ 50,000	$ 100,000	$ 50,000