Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2012


December 31
(add 000)	2012			2011
Land and land improvements	$	645,095		$	620,940
Mineral reserves and interests		430,884			421,820
Buildings		116,332			111,796
Machinery and equipment		2,511,222			2,407,045
Construction in progress		109,054			127,091
		3,812,587			3,688,692
Less allowances for depreciation, depletion and amortization		(2,059,346	)		(1,914,401	)
Total	$	1,753,241		$	1,774,291

- 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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