Property, Plant and Equipment

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment [Abstract]

Note 6. Property, Plant and Equipment

The major categories of property, plant and equipment and accumulated depreciation and depletion are presented below:

Thousands of Dollars		2012			2011

Land	$	26,467		$	27,370
Quarries/mining properties		39,596			39,596
Buildings		145,082			147,115
Machinery and equipment		937,559			911,753
Construction in progress		27,805			31,060
Furniture and fixtures and other		85,443			91,755
		1,261,952			1,248,649
Less: Accumulated depreciation and depletion		(944,283	)		(930,515	)
Property, plant and equipment, net	$	317,669		$	318,134

Depreciation and depletion expense for the years ended December 31, 2012, 2011 and 2010 was $48.7 million, $55.9 million and $61.2 million, respectively.

- Definition

The entire disclosure for 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. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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