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Other-net (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 28, 2019
Jun. 29, 2018
Jun. 28, 2019
Jun. 29, 2018
Other Income and Expenses [Abstract]        
Metal consignment fees $ 2,225 $ 2,588 $ 5,316 $ 5,017
Amortization of Intangible Assets 368 561 758 1,334
Foreign currency loss (gain) 307 1,230 384 1,219
Net loss (gain) on disposal of fixed assets 118 (3) 142 23
Rental Income (29) (134) (58) (260)
Other items (98) 71 470 (96)
Total $ 2,891 $ 4,313 $ 7,012 $ 7,237