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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2012
Components of Inventories | The components of inventories are as follows:
|  | December 31, |
|  | 2012 |  |  | 2011 |
|  | (In thousands) |
Raw materials |  | $ | 125,909 |  |  | $ | 126,489 |
Work in process |  |  | 8,287 |  |  |  | 7,610 |
Finished goods |  |  | 78,788 |  |  |  | 74,391 |
Supplies and materials |  |  | 119,284 |  |  |  | 115,541 |
Inventories at FIFO or average cost |  |  | 332,268 |  |  |  | 324,031 |
Excess of FIFO or average cost over LIFO cost |  |  | (63,501 | ) |  |  | (69,356 | )
Inventories, net |  | $ | 268,767 |  |  | $ | 254,675 |
Property, Plant and Equipment, At Cost | Property, plant and equipment are recorded at cost, and consist of the following:
|  | December 31, |
|  | 2012 |  |  | 2011 |
|  | (In thousands) |
Land and land improvements |  | $ | 107,250 |  |  | $ | 102,483 |
Buildings |  |  | 390,363 |  |  |  | 377,664 |
Machinery and equipment |  |  | 3,048,932 |  |  |  | 3,045,145 |
Construction in progress |  |  | 67,051 |  |  |  | 66,098 |
Other |  |  | 27,196 |  |  |  | 27,170 |
Property, plant and equipment, at cost |  |  | 3,640,792 |  |  |  | 3,618,560 |
Less accumulated depreciation |  |  | (2,274,723 | ) |  |  | (2,141,906 | )
Property, plant and equipment, net |  | $ | 1,366,069 |  |  | $ | 1,476,654 |
Estimated Useful Lives of Assets | The following lives are used for the various categories of assets:
Buildings and land improvements |  |  | 5 to 40 years |
Machinery and equipment |  |  | 3 to 25 years |
Trucks and automobiles |  |  | 3 to 10 years |
Furniture and fixtures |  |  | 3 to 20 years |
Computers and hardware |  |  | 3 to 7 years |
|  |  | Period of the lease or |
Leasehold improvements |  |  | useful life, if shorter |

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- Definition Tabular disclosure of the cost of property, plant and equipment by type. + References No definition available. + Details
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- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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