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Property, plant and equipment and inventory
6 Months Ended
Jun. 30, 2011
Property, plant and equipment and inventory [Abstract]  
Property, plant and equipment and inventory
Note E — Property, plant and equipment and inventory
Property, plant and equipment is comprised of the following at June 30, 2011 and December 31, 2010 (in thousands):
                 
    June 30,     December 31,  
    2011     2010  
Machinery and equipment
  $ 31,440     $ 27,610  
Office furniture, computers and software
    18,754       17,623  
Leasehold improvements
    15,236       9,551  
 
           
 
    65,430       54,784  
Less: accumulated depreciation
    (25,797 )     (21,300 )
 
           
Total
  $ 39,633     $ 33,484  
 
           
Depreciation expense was $2.4 million and $4.8 million for the three and six months ended June 30, 2011, respectively, and $2.2 million and $4.1 million for the three and six months ended June 30, 2010, respectively.
Inventory is comprised of the following at June 30, 2011 and December 31, 2010 (in thousands):
                 
    June 30,     December 31,  
    2011     2010  
Raw materials and supplies
  $ 60,459     $ 47,444  
Finished goods
    30,157       31,830  
Less: obsolescence reserve
    (2,381 )     (1,862 )
 
           
Total
  $ 88,235     $ 77,412