Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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VARIABLE INTEREST ENTITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Variable Interest Entity [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 201,451	$ 189,360	$ 189,114	$ 129,170	$ 129,170
Inventory, Net	331,432us-gaap_InventoryNet	384,920us-gaap_InventoryNet
Other	10,984us-gaap_OtherAssetsCurrent	8,398us-gaap_OtherAssetsCurrent
Goodwill	0us-gaap_Goodwill	42,075us-gaap_Goodwill	24,941us-gaap_Goodwill
Property, Plant and Equipment, Net	527,414us-gaap_PropertyPlantAndEquipmentNet	638,807us-gaap_PropertyPlantAndEquipmentNet
Other Assets, Noncurrent	116,757us-gaap_OtherAssetsNoncurrent	129,699us-gaap_OtherAssetsNoncurrent
Total assets	1,495,724us-gaap_Assets	1,821,231us-gaap_Assets	1,710,235us-gaap_Assets
Liabilities, Current	301,556us-gaap_LiabilitiesCurrent	386,571us-gaap_LiabilitiesCurrent
Liabilities	905,666us-gaap_Liabilities	1,023,195us-gaap_Liabilities
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash and Cash Equivalents, at Carrying Value	8,861	17,106
Inventory, Net	9,645	33,406
Other	18,115	17,000
Goodwill	0	20,601
Property, Plant and Equipment, Net	36,353	76,060
Other Assets, Noncurrent	8,016	16,673
Total assets	80,990	180,846
Liabilities, Current	11,659	23,816
Liabilities, Noncurrent	7,448	15,818
Liabilities	$ 19,107	$ 39,634