SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

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