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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, plant and equipment at December 31, 2023 and 2022 consists of the following:
(In thousands) | 2023 |  | 2022 |  | Estimated useful lives in years
Land | $ | 44,177 |  |  | $ | 62,192 |  |  |
Buildings and improvements | 779,589 |  |  | 490,903 |  |  | 5-35
Manufacturing equipment | 685,504 |  |  | 569,224 |  |  | 5-10
Canisters and cylinders | 186,231 |  |  | 168,516 |  |  | 3-12
Molds | 83,745 |  |  | 76,388 |  |  | 3-5
Office furniture and lab equipment | 299,438 |  |  | 330,284 |  |  | 3-8
Construction in progress | 297,448 |  |  | 465,923 |  |  |
Total property, plant and equipment | 2,376,132 |  |  | 2,163,430 |  |  |
Less accumulated depreciation | 908,089 |  |  | 770,093 |  |  |
Property, plant and equipment, net | $ | 1,468,043 |  |  | $ | 1,393,337 |  |  |
The table below sets forth the depreciation expense for the years ended December 31, 2023, 2022 and 2021:
(In thousands) | 2023 |  | 2022 |  | 2021
Depreciation expense | $ | 172,683 |  |  | $ | 135,371 |  |  | $ | 90,311 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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