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Inventories

3 Months Ended

12 Months Ended

Mar. 31, 2017

Dec. 31, 2016

Inventory, Net [Abstract]

Inventories

Inventories

Inventories consist of the following:
	March 31, 2017			December 31, 2016
Raw materials	$	74,121		$	59,415
Work-in-process	41,331			35,539
Finished goods	22,440			26,613
Operating and other supplies	106,828			111,996
Total inventories	$	244,720		$	233,563

Inventories are stated at the lower of cost or Net Realizable Value ("NRV") using the first-in, first-out ("FIFO") or the weighted average cost method.

Inventories

Inventories, at December 31, consist of the following:

	2016			2015
Raw materials	$	59,415		$	52,121
Work-in-process	35,539			34,025
Finished goods	26,613			15,988
Operating and other supplies	111,996			129,738
Inventories	$	233,563		$	231,872

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- Definition

The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766

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- References

No definition available.

+ Details

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