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Property, Plant & Equipment
9 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Line Items]  
Property, Plant & Equipment
Property, Plant & Equipment

Property, plant and equipment consisted of the following at September 30, 2013 and December 31, 2012:
 
September 30, 2013
 
December 31, 2012
Property, plant and equipment
$
106,574,000

 
$
99,747,000

Accumulated depreciation
(51,740,000
)
 
(48,189,000
)
Property, plant and equipment — net
$
54,834,000

 
$
51,558,000



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 $6,326,000 and $454,000 at September 30, 2013 and December 31, 2012, respectively, and primarily related to the Company's compression molding capacity expansion. The Company capitalized $37,000 and $174,000 of interest expense for the nine months ended September 30, 2013 and 2012, respectively. At September 30, 2013, and December 31, 2012, purchase commitments for capital expenditures in progress were $4,582,000 and $662,000, respectively. At September 30, 2013, these commitments were primarily related to the Company's compression molding capacity expansion, which is discussed further in Note 6.