Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive 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			26,405		26,405
Other comprehensive income (loss)				(578)	(578)
Stock issuances, net of shares withheld for taxes		(16,663)			(16,663)
Stock issuances, net of shares withheld for taxes (in shares)	520
Stock-based compensation		12,197			12,197
Balance at Mar. 31, 2018	$ 4	98,396	904,160	(1,985)	1,000,575
Balance (in shares) at Mar. 31, 2018	43,227
Balance at Dec. 29, 2018	$ 4	107,517	961,343	(1,574)	$ 1,067,290
Balance (in shares) at Dec. 29, 2018	43,088				43,088,000
Increase (Decrease) in Stockholders' Equity
Net income			5,398		$ 5,398
Other comprehensive income (loss)				1,323	1,323
Stock issuances, net of shares withheld for taxes		(14,113)			(14,113)
Stock issuances, net of shares withheld for taxes (in shares)	430
Repurchases of common stock		(15,004)			(15,004)
Repurchases of common stock (in shares)	(177)
Stock-based compensation		12,588			12,588
Balance at Mar. 30, 2019	$ 4	$ 90,988	$ 966,741	$ (251)	$ 1,057,482
Balance (in shares) at Mar. 30, 2019	43,341				43,341,000