Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at Jan. 02, 2010	$ 629,796	$ 5	$ 128,262	$ 505,885	$ (4,356)
Balance (in shares) at Jan. 02, 2010		45,772
Increase (Decrease) in Stockholders' Equity
Net income	73,242			73,242
Other comprehensive income	708				708
Stock issuances under employee plans, net of shares withheld for taxes	18,055		18,055
Stock issuances under employee plans, net of shares withheld for taxes (in shares)		1,453
Income tax benefit from employee stock-based awards	3,277		3,277
Repurchases of common stock	(140,332)	(1)	(140,331)
Repurchases of common stock (in shares)	(3,300)	(3,292)
Stock-based compensation	40,684		40,684
Balance at Jan. 01, 2011	625,430	4	49,947	579,127	(3,648)
Balance (in shares) at Jan. 01, 2011		43,933
Increase (Decrease) in Stockholders' Equity
Net income	35,472			35,472
Other comprehensive income	1,181				1,181
Stock issuances under employee plans, net of shares withheld for taxes	7,660		7,660
Stock issuances under employee plans, net of shares withheld for taxes (in shares)		1,290
Income tax benefit from employee stock-based awards	2,707		2,707
Repurchases of common stock	(110,063)		(82,117)	(27,946)
Repurchases of common stock (in shares)	(3,200)	(3,155)
Stock-based compensation	36,552		36,552
Balance at Dec. 31, 2011	598,939	4	14,749	586,653	(2,467)
Balance (in shares) at Dec. 31, 2011	42,068	42,068
Increase (Decrease) in Stockholders' Equity
Net income	63,548			63,548
Other comprehensive income	1,521				1,521
Stock issuances under employee plans, net of shares withheld for taxes	15,148		15,148
Stock issuances under employee plans, net of shares withheld for taxes (in shares)	1,600	1,560
Income tax benefit from employee stock-based awards	1,675		1,675
Repurchases of common stock	(62,019)		(52,611)	(9,408)
Repurchases of common stock (in shares)	(1,700)	(1,749)
Stock-based compensation	31,161		31,161
Balance at Dec. 29, 2012	$ 649,973	$ 4	$ 10,122	$ 640,793	$ (946)
Balance (in shares) at Dec. 29, 2012	41,879	41,879