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. 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 (detriment) 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
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)		1,560
Income tax benefit (detriment) 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
Increase (Decrease) in Stockholders' Equity
Net income	49,819			49,819
Other comprehensive income	262				262
Stock issuances under employee plans, net of shares withheld for taxes	15,301		15,301
Stock issuances under employee plans, net of shares withheld for taxes (in shares)		1,057
Income tax benefit (detriment) from employee stock-based awards	(772)		(772)
Repurchases of common stock	(26,022)		(26,022)
Repurchases of common stock (in shares)	(700)	(661)
Stock-based compensation	30,753		30,753
Stock issued in business combination	19,248		19,248
Stock issued in business combination (in shares)	500	504
Balance at Dec. 28, 2013	$ 738,562	$ 4	$ 48,630	$ 690,612	$ (684)
Balance (in shares) at Dec. 28, 2013	42,779	42,779