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VARIABLE INTEREST ENTITIES (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2012
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Variable Interest Entity [Line Items] |  |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value | $ 190,551 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 201,451 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 200,094 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 189,360 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 200,094 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 189,360 us-gaap_CashAndCashEquivalentsAtCarryingValue
Inventory, Net | 307,318 us-gaap_InventoryNet | 331,432 us-gaap_InventoryNet |  |  |  |
Property, Plant and Equipment, Net | 482,593 us-gaap_PropertyPlantAndEquipmentNet | 527,414 us-gaap_PropertyPlantAndEquipmentNet |  |  |  |
Other Assets, Noncurrent | 111,781 us-gaap_OtherAssetsNoncurrent | 116,757 us-gaap_OtherAssetsNoncurrent |  |  |  |
Assets | 1,442,475 us-gaap_Assets | 1,495,724 us-gaap_Assets |  |  |  |
Liabilities, Current | 317,085 us-gaap_LiabilitiesCurrent | 301,556 us-gaap_LiabilitiesCurrent |  |  |  |
Liabilities | 899,090 us-gaap_Liabilities | 905,666 us-gaap_Liabilities |  |  |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 1,100 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 8,861 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Inventory, Net | 9,064 us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 9,645 us-gaap_InventoryNet / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Other Assets, Current | 25,376 us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 18,115 us-gaap_OtherAssetsCurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Property, Plant and Equipment, Net | 33,660 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 36,353 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Other Assets, Noncurrent | 7,513 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 8,016 us-gaap_OtherAssetsNoncurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Assets | 76,713 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 80,990 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Liabilities, Current | 13,365 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 11,659 us-gaap_LiabilitiesCurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Liabilities, Noncurrent | 2,518 us-gaap_LiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | 7,448 us-gaap_LiabilitiesNoncurrent / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |
Liabilities | $ 15,883 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember | $ 19,107 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember |  |  |  |

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- Definition 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. + 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 210.5-02.18) -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 S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3044-108585 + Details
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + 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(a)) -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 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51655945&loc=d3e3927-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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