Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventory, Finished Goods, Net of Reserves	$ 9,155	$ 10,772
Other Inventory, Net of Reserves	16,349	20,761
Inventory, Supplies, Net of Reserves	35,149	34,746
Inventory	60,653	66,279
Ore on Leach Pad, Current	74,517	75,122
Ore on leach pads, noncurrent	72,633	66,964
Inventory, Ore Stockpiles on Leach Pads, Gross	147,150	142,086
Inventory and Ore on Leach Pads	$ 207,803	$ 208,365

Inventory and Ore on Leach Pads.

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- Definition

Ore on leach pad current.

+ References

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- Definition

Ore on leach pad non current.

+ References

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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before last-in first-out (LIFO) and valuation reserves of ore stockpile material contained on a leach pad, for example, but not limited to, copper or gold ore.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

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Amount, after of valuation reserves and allowances, of inventory, classified as other, expected to be sold, or consumed within one year or operating cycle, if longer.

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