Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Current:
Federal	$ 616	$ 3,250	$ 697
State	142	9	85
Foreign	5,054	2,998	2,111
Total current	5,812	6,257	2,893
Deferred:
Federal	3,875	6,314	(16,641)
State	(18)	53	(320)
Foreign	207	472	(832)
Total deferred	4,064	6,839	(17,793)
Provision (benefit) for income taxes	$ 9,876	$ 13,096	$ (14,900)