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Property, Plant & Equipment
9 Months Ended
Sep. 30, 2012
Property, Plant and Equipment [Line Items]  
Property, Plant & Equipment
Property, Plant & Equipment

Property, plant and equipment consisted of the following at September 30, 2012 and December 31, 2011:
 
September 30, 2012
 
December 31, 2011
Property, plant and equipment
$
99,645,000

 
$
93,236,000

Accumulated depreciation
(47,307,000
)
 
(43,892,000
)
Property, plant and equipment — net
$
52,338,000

 
$
49,344,000



Property, plant, and equipment are recorded at cost. Depreciation is provided on a straight-line method over the estimated useful lives of the assets. The carrying amount of long-lived assets is evaluated annually to determine if an adjustment to the depreciation period or to the unamortized balance is warranted. Additions in progress were $3,217,000 and $7,271,000 at September 30, 2012 and December 31, 2011, respectively and primarily relate to the Matamoros , Mexico production facility expansion. The Company capitalized $174,000 and $35,000 of interest expense for the nine months ended September 30, 2012 and 2011, respectively. For the three months ended September 30, 2012 and 2011, the Company capitalized $34,000 and $35,000 of interest expense, respectively. At September 30, 2012 and December 31, 2011, purchase commitments for capital expenditures in progress were $1,403,000 and $4,356,000, respectively. These commitments are primarily related to the Company's Matamoros production facility expansion project.