Condensed 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 Dec. 30, 2017	$ 4	$ 102,862	$ 851,307	$ (1,157)	$ 953,016
Balance (in shares) at Dec. 30, 2017	42,707
Increase (Decrease) in Stockholders' Equity
Cumulative effect of adoption of accounting standard			26,448	(250)	26,198
Net income			68,446		68,446
Other comprehensive income (loss)				(260)	(260)
Stock issuances, net of shares withheld for taxes		(12,342)			(12,342)
Stock issuances, net of shares withheld for taxes (in shares)	697
Repurchases of common stock		(24,272)			(24,272)
Repurchases of common stock (in shares)	(257)
Stock-based compensation		36,921			36,921
Balance at Sep. 29, 2018	$ 4	103,169	946,201	(1,667)	1,047,707
Balance (in shares) at Sep. 29, 2018	43,147
Balance at Jun. 30, 2018	$ 4	111,984	918,440	(1,960)	1,028,468
Balance (in shares) at Jun. 30, 2018	43,350
Increase (Decrease) in Stockholders' Equity
Net income			27,761		27,761
Other comprehensive income (loss)				293	293
Stock issuances, net of shares withheld for taxes		(518)			(518)
Stock issuances, net of shares withheld for taxes (in shares)	18
Repurchases of common stock		(20,876)			(20,876)
Repurchases of common stock (in shares)	(221)
Stock-based compensation		12,579			12,579
Balance at Sep. 29, 2018	$ 4	103,169	946,201	(1,667)	1,047,707
Balance (in shares) at Sep. 29, 2018	43,147
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
Increase (Decrease) in Stockholders' Equity
Net income			9,550		$ 9,550
Other comprehensive income (loss)				2,180	2,180
Stock issuances, net of shares withheld for taxes		(8,585)			(8,585)
Stock issuances, net of shares withheld for taxes (in shares)	586
Repurchases of common stock		(26,716)			(26,716)
Repurchases of common stock (in shares)	(301)
Stock-based compensation		40,035			40,035
Balance at Sep. 28, 2019	$ 4	112,251	970,893	606	$ 1,083,754
Balance (in shares) at Sep. 28, 2019	43,373				43,373
Balance at Jun. 29, 2019	$ 4	99,665	950,712	890	$ 1,051,271
Balance (in shares) at Jun. 29, 2019	43,344
Increase (Decrease) in Stockholders' Equity
Net income			20,181		20,181
Other comprehensive income (loss)				(284)	(284)
Stock issuances, net of shares withheld for taxes		(1,185)			(1,185)
Stock issuances, net of shares withheld for taxes (in shares)	29
Stock-based compensation		13,771			13,771
Balance at Sep. 28, 2019	$ 4	$ 112,251	$ 970,893	$ 606	$ 1,083,754
Balance (in shares) at Sep. 28, 2019	43,373				43,373