Inventory and Ore on Leach Pads (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Inventory, Finished Goods, Net of Reserves	$ 10,772	$ 6,831
Other Inventory, Net of Reserves	20,761	18,803
Inventory, Supplies, Net of Reserves	34,746	32,596
Inventory	66,279	58,230
Ore on Leach Pad, Current	75,122	73,752
Ore on leach pads, noncurrent	66,964	65,393
Inventory, Ore Stockpiles on Leach Pads, Gross	142,086	139,145
Inventory and Ore on Leach Pads	$ 208,365	$ 197,375

Inventory and Ore on Leach Pads.

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- Definition

Ore on leach pad current.

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- Definition

Ore on leach pad non current.

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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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