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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2020
Property Plant And Equipment [Abstract] |
Property, Plant and Equipment | NOTE 6. PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment consist of the following at December 31:
(in thousands) | Range of useful lives |  | 2020 |  |  | 2019 |
Land |  |  | $ | 7,333 |  |  | $ | 7,875 |
Buildings and improvements | 10-40 years |  |  | 126,576 |  |  |  | 123,342 |
Machinery and equipment | 2-25 years |  |  | 377,782 |  |  |  | 360,570 |
Construction in progress |  |  |  | 6,020 |  |  |  | 6,326 |
|  |  |  | 517,711 |  |  |  | 498,113 |
Less: accumulated depreciation |  |  |  | (229,167 | ) |  |  | (211,730 | )
Total property, plant and equipment, net |  |  | $ | 288,544 |  |  | $ | 286,383 |
Depreciation expense for property and equipment was $25.2 million, $23.9 million and $22.8 million in 2020, 2019 and 2018, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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