Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2011	$ 4	$ 14,749	$ 586,653	$ (2,467)	$ 598,939
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 (shortfall) from stock-based awards		1,675			1,675
Repurchase of common stock		(52,611)	(9,408)		(62,019)
Repurchase of common stock (in shares)	(1,749)
Stock-based compensation		31,161			31,161
Balance at Dec. 29, 2012	4	10,122	640,793	(946)	649,973
Balance (in shares) at Dec. 29, 2012	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 (shortfall) from stock-based awards		(772)			(772)
Repurchase of common stock		(26,022)			(26,022)
Repurchase of common stock (in shares)	(661)
Stock-based compensation		30,753			30,753
Stock issued in business combination		19,248			19,248
Stock issued in business combination (in shares)	504
Balance at Dec. 28, 2013	4	48,630	690,612	(684)	738,562
Balance (in shares) at Dec. 28, 2013	42,779				42,779
Increase (Decrease) in Stockholders' Equity
Net income			38,021		38,021
Other comprehensive income				602	602
Stock issuances under employee plans, net of shares withheld for taxes		13,320			13,320
Stock issuances under employee plans, net of shares withheld for taxes (in shares)	1,124
Income tax benefit (shortfall) from stock-based awards		120			120
Repurchase of common stock		(71,676)			(71,676)
Repurchase of common stock (in shares)	(1,678)
Stock-based compensation		39,107			39,107
Balance at Jan. 03, 2015	$ 4	$ 29,501	$ 728,633	$ (82)	$ 758,056
Balance (in shares) at Jan. 03, 2015	42,225				42,225