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Property, Plant & Equipment | 3 Months Ended
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Mar. 31, 2014
Property, Plant and Equipment [Line Items] |
Property, Plant & Equipment | Property, Plant & Equipment Property, plant and equipment consisted of the following at March 31, 2014 and December 31, 2013:
| March 31, 2014 |  | December 31, 2013
Property, plant and equipment | $ | 114,127,000 |  |  | $ | 109,407,000 |
Accumulated depreciation | (54,269,000 | ) |  | (52,929,000 | )
Property, plant and equipment — net | $ | 59,858,000 |  |  | $ | 56,478,000 |
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 $7,955,000 and $5,953,000 at March 31, 2014 and December 31, 2013, respectively. The Company capitalized $22,000 and $0 of interest expense for the three months ended March 31, 2014 and 2013, respectively. At March 31, 2014, and December 31, 2013, purchase commitments for capital expenditures in progress were $5,868,000 and $4,629,000, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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