Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Changes in the carrying amount of goodwill
Balance at the beginning of the period, Goodwill gross	$ 164,625	$ 165,417
Effects of foreign currency translation	296	(792)
Balance at the end of the period, Goodwill gross	164,921	164,625	$ 165,417
Balance at the beginning of the period, Accumulated impairment losses	(76,417)	(76,417)
Balance at the end of the period, Accumulated impairment losses	(76,417)	(76,417)	(76,417)
Goodwill, net	88,504	88,208	89,000
Balance at the end of the period, Goodwill, net	$ 88,504	$ 88,208	89,000
Intangible assets impairment losses			$ 530