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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | 6. Property, Plant and Equipment Property, plant and equipment consist of the following:
December 31, |  | 2022 |  |  | 2021 |
Land and improvements |  | $ | 2,826 |  |  | $ | 2,686 |
Buildings and improvements |  |  | 72,788 |  |  |  | 62,781 |
Machinery and equipment |  |  | 314,032 |  |  |  | 302,241 |
Dies and tools |  |  | 57,480 |  |  |  | 53,574 |
Property, plant and equipment |  |  | 447,126 |  |  |  | 421,282 |
Less allowances for depreciation |  |  | (370,273 | ) |  |  | (347,651 | )
Net property, plant and equipment |  | $ | 76,853 |  |  | $ | 73,631 |
Depreciation expense totaled $24.4 million, $25.8 million, and $27.3 million in 2022, 2021, and 2020, 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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://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 https://asc.fasb.org/extlink&oid=126982197&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 https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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