Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Jan. 02, 2016	$ 4	$ 13,868	$ 747,749	$ (507)	$ 761,114
Balance (in shares) at Jan. 02, 2016	41,727
Increase (Decrease) in Stockholders' Equity
Net income			61,494		61,494
Other comprehensive income (loss)				999	999
Stock issuances, net of shares withheld for taxes		6,346			6,346
Stock issuances, net of shares withheld for taxes (in shares)	1,055
Income tax benefit (shortfall) from stock-based awards		(2,061)			(2,061)
Repurchases of common stock	$ (40,500)	(33,299)	(7,244)		(40,543)
Repurchases of common stock (in shares)	(893)
Stock-based compensation		39,609			39,609
Balance at Dec. 31, 2016	$ 4	24,463	801,999	492	826,958
Balance (in shares) at Dec. 31, 2016	41,889
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of accounting standard			2,216		2,216
Net income			47,092		47,092
Other comprehensive income (loss)				(1,649)	(1,649)
Stock issuances, net of shares withheld for taxes		(3,938)			(3,938)
Stock issuances, net of shares withheld for taxes (in shares)	818
Stock-based compensation		44,809			44,809
Convertible debt issuance		37,528			37,528
Balance at Dec. 30, 2017	$ 4	102,862	851,307	(1,157)	$ 953,016
Balance (in shares) at Dec. 30, 2017	42,707				42,707
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of accounting standard			26,445	(250)	$ 26,195
Net income			83,591		83,591
Other comprehensive income (loss)				(167)	(167)
Stock issuances, net of shares withheld for taxes		(6,180)			(6,180)
Stock issuances, net of shares withheld for taxes (in shares)	815
Repurchases of common stock	$ (39,300)	(39,276)			(39,276)
Repurchases of common stock (in shares)	(434)
Stock-based compensation		50,111			50,111
Balance at Dec. 29, 2018	$ 4	$ 107,517	$ 961,343	$ (1,574)	$ 1,067,290
Balance (in shares) at Dec. 29, 2018	43,088				43,088