Inventories, Net - Supplemental Inventory Information (Details) $ in Thousands |
Sep. 30, 2021
USD ($)
$ / oz
|
Dec. 31, 2020
USD ($)
$ / oz
|
---|---|---|
Inventory Disclosure [Abstract] | ||
Precious metals stated at LIFO cost | $ | $ 4,084 | $ 4,956 |
Precious metals stated under non-LIFO cost methods, primarily at fair value | $ | $ 34,679 | $ 26,033 |
Market value per ounce: | ||
Silver (in dollars per ounce) | 22.43 | 26.28 |
Gold (in dollars per ounce) | 1,751.65 | 1,891.7 |
Palladium (in dollars per ounce) | 1,968.54 | 2,448.54 |