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Inventories
9 Months Ended
Sep. 30, 2012
Inventories [Abstract]  
Inventories

5. Inventories

Inventories consisted of the following at (in thousands):

    September 30,   December 31,
    2012   2011   2011
 
Raw materials $ 79,117 $ 84,294 $ 77,066
Work in process   4,802   2,335   3,224
Finished goods   14,474   11,136   11,762
Inventories $ 98,393 $ 97,765 $ 92,052