Income Taxes - Income before income taxes and Provision (benefit) for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income before income taxes
Domestic	$ 2,025	$ 19,777	$ 9,700
Foreign	47,624	52,384	67,203
Income before income taxes	49,649	72,161	76,903
Current:
Domestic	(779)	(8,843)	48,947
Foreign	8,157	5,888	7,077
Total Current	7,378	(2,955)	56,024
Deferred:
Domestic	33,624	(8,978)	(25,760)
Foreign	(10,618)	503	(453)
Total Deferred	23,006	(8,475)	(26,213)
Provision (benefit) for income taxes	$ 30,384	$ (11,430)	$ 29,811