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Inventories, Net (Tables)
 6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
A summary of Inventories, net is as follows:
June 30, 2020December 31, 2019
Finished products$42,460  $48,484  
In-process29,420  30,913  
Raw materials48,228  46,440  
Fine and fabricated precious metal in various stages of completion
25,827  29,202  
145,935  155,039  
LIFO reserve(2,012) (3,398) 
Total$143,923  $151,641  
Inventory Supplemental Disclosure
June 30, 2020December 31, 2019
Supplemental inventory information:
Precious metals stated at LIFO cost$2,849  $15,660  
Precious metals stated under non-LIFO cost methods, primarily at fair value$20,966  $10,144  
Market value per ounce:
Silver$17.88  $17.86  
Gold$1,767.93  $1,522.14  
Palladium$1,894.23  $1,935.19