Asset Impairment Charge

12 Months Ended

Dec. 31, 2011

(12)	Asset Impairment Charge

During the third quarter ended September 30, 2009, our minerals and materials segment recorded a non-cash impairment charge of $1,980 to write down certain fixed assets to their estimated fair values based on a third-party appraisal (Level 2 inputs). The impairment charge is related to the closing of a plant within our minerals and materials segment due to reduced demand. This impairment charge was recorded within cost of sales within our Consolidated Statement of Operations. In addition, we increased our inventory reserve by $293 (also recorded within the cost of sales) to record the excess of cost over net realizable value of the inventory located at this plant, bringing the total expense associated with this write-off to $2,273.