Consolidated Statements of Shareholders' (Deficit) Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)
Balance (in shares) at Dec. 31, 2017		38,813
Balance at Dec. 31, 2017	$ 89,156	$ 388	$ 0	$ 88,768
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	69,539			69,539
Exercise of common stock options (in shares)		186
Exercise of common stock options	2,788	$ 2	2,786
Stock-based compensation (in shares)		271
Stock-based compensation	11,412	$ 3	11,409
Repurchases of common stock (in shares)		(8,402)
Repurchases of common stock	(282,445)	$ (84)	(14,195)	(268,166)
Balance (in shares) at Dec. 29, 2018		30,868
Balance at Dec. 29, 2018	(109,550)	$ 309	0	(109,859)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	81,845			81,845
Exercise of common stock options (in shares)		381
Exercise of common stock options	7,190	$ 4	7,186
Stock-based compensation (in shares)		480
Stock-based compensation	16,657	$ 5	16,652
Repurchases of common stock (in shares)		(3,768)
Repurchases of common stock	$ (155,573)	$ (38)	(23,838)	(131,697)
Balance (in shares) at Dec. 28, 2019	27,961	27,961
Balance at Dec. 28, 2019	$ (159,431)	$ 280	0	(159,711)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 139,189			139,189
Exercise of common stock options (in shares)	420	420
Exercise of common stock options	$ 9,602	$ 4	9,598
Stock-based compensation (in shares)		620
Stock-based compensation	21,813	$ 6	21,807
Repurchases of common stock (in shares)		(3,611)
Repurchases of common stock	$ (235,151)	$ (36)	(31,405)	(203,710)
Balance (in shares) at Jan. 02, 2021	25,390	25,390
Balance at Jan. 02, 2021	$ (223,978)	$ 254	$ 0	$ (224,232)