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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Changes in the carrying amount of goodwill    
Balance at the beginning of the period, Goodwill gross $ 165,417 $ 151,181
Goodwill adjustment related to acquisition   12,994
Effects of foreign currency translation (792) 1,242
Balance at the end of the period, Goodwill gross 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)
Balance at the beginning of the period, Goodwill, net 89,000 74,764
Balance at the end of the period, Goodwill, net $ 88,208 89,000
Intangible assets impairment losses   $ 530