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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 30, 2019
Dec. 29, 2018
Changes in the carrying amount of goodwill    
Balance at the beginning of the period, Goodwill gross $ 164,625  
Effects of foreign currency translation 300  
Balance at the end of the period, Goodwill gross 164,925 $ 164,625
Balance at the beginning of the period, Accumulated impairment losses (76,417)  
Balance at the end of the period, Accumulated impairment losses (76,417) (76,417)
Goodwill, net 88,508 88,208
Balance at the end of the period, Goodwill, net 88,508 88,208
Intangible assets impairment losses $ 0 $ 0