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Other-net (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Other Income and Expenses [Abstract]    
Metal consignment fees $ 3,091 $ 2,429
Amortization of Intangible Assets 390 773
Foreign currency loss (gain) 77 (11)
Net loss on disposal of fixed assets 24 26
Rental Income (29) (126)
Other items 568 (167)
Total $ 4,121 $ 2,924