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Inventories
6 Months Ended
Jun. 30, 2011
Inventories [Abstract]  
Inventories

8. Inventories

Inventories consist of the following:

     

(in thousands) June 30,
2011
December 31,
2010

Finished goods $78,402 $71,919
Work in process 59,238 48,973
Raw material and supplies 42,089 35,279

Total inventories $179,729 $156,171

Inventories are stated at the lower of cost or market and are valued at average cost, net of reserves. We record a provision for obsolete inventory based on the age and category of the inventories.