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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, plant and equipment | Property, plant and equipment Details of the Company's property, plant and equipment at December 31 are as follows:
| 2021 |  | 2020
Land | $ | 112,714 |  |  | $ | 119,262 |
Timber resources | 42,355 |  |  | 42,310 |
Buildings | 550,497 |  |  | 566,529 |
Machinery and equipment | 3,179,781 |  |  | 3,191,008 |
Construction in progress | 237,056 |  |  | 132,223 |
| 4,122,402 |  |  | 4,051,332 |
Accumulated depreciation and depletion | (2,824,902) |  |  | (2,807,222) |
Property, plant and equipment, net | $ | 1,297,500 |  |  | $ | 1,244,110 |
Depreciation and depletion expense amounted to $189,667 in 2021, $201,004 in 2020 and $186,540 in 2019.

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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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