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Property, Plant & Equipment
3 Months Ended
Mar. 31, 2013
Property, Plant and Equipment [Line Items]  
Property, Plant & Equipment
Property, Plant & Equipment

Property, plant and equipment consisted of the following at March 31, 2013 and December 31, 2012:
 
March 31, 2013
 
December 31, 2012
Property, plant and equipment
$
101,960,000

 
$
99,747,000

Accumulated depreciation
(49,403,000
)
 
(48,189,000
)
Property, plant and equipment — net
$
52,557,000

 
$
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 $796,000 and $454,000 at March 31, 2013 and December 31, 2012, respectively. The Company did not capitalize any interest for the three months ended March 31, 2013, and capitalized $17,000 of interest expense for the three months ended March 31, 2012. At March 31, 2013 and December 31, 2012, purchase commitments for capital expenditures in progress were $7,160,000 and $662,000, respectively. The purchase commitments at March 31, 2013 primarily relate to the Company's compression molding capacity expansion, which is discussed further in Note 6.