Property, Plant And Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment, Net [Abstract]


December 31
(add 000)	2011			2010
Land and land improvements	$	620,940		$	594,866
Mineral reserves and interests		421,820			351,543
Buildings		111,796			108,266
Machinery and equipment		2,407,045			2,420,759
Construction in progress		127,091			92,841
		3,688,692			3,568,275
Less allowances for depreciation, depletion and amortization		(1,914,401	)		(1,880,445	)
Total	$	1,774,291		$	1,687,830

- 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.

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