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Other-net (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Other Income and Expenses [Abstract]        
Metal consignment fees $ 2,588 $ 2,062 $ 5,017 $ 3,747
Amortization of Intangible Assets 561 1,232 1,334 2,277
Foreign currency exchange/translation (gain) 1,230 (336) 1,219 (593)
Net loss (gain) on disposal of fixed assets (3) 119 23 147
Other items (63) 127 (356) 444
Total $ 4,313 $ 3,204 $ 7,237 $ 6,022