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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Changes in the carrying amount of goodwill      
Balance at the beginning of the period, gross $ 154,196 $ 153,466  
Goodwill adjustments related to acquisitions   1,797  
Effect of foreign currency translation (809) (1,067)  
Balance at the end of the period, gross 153,387 154,196 $ 153,466
Balance at the beginning of the period, Accumulated impairment losses (71,893) (71,893)  
Goodwill impairment related to NeuCo (4,524)    
Balance at the end of the period, Accumulated impairment losses (76,417) (71,893) (71,893)
Balance at the beginning of the period, net 82,303 81,573  
Balance at the end of the period, net 76,970 82,303 81,573
Intangible assets impairment losses $ 0 $ 0 $ 0