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Property, Plant and Equipment, Net | 12 Months Ended
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Dec. 31, 2024
Property, Plant and Equipment, Net |
Property, Plant and Equipment, Net | 8. Property, Plant and Equipment, net Property, plant and equipment, net is comprised of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(in thousands) | ​ | 2024 | ​ | 2023
Compression equipment, facilities and other fleet assets | ​ | $ | 4,392,818 | ​ | $ | 3,326,919
Land and buildings | ​ |  | 32,060 | ​ |  | 30,169
Transportation and shop equipment | ​ |  | 118,413 | ​ |  | 100,474
Computer hardware and software | ​ |  | 78,021 | ​ |  | 77,532
Other | ​ |  | 7,411 | ​ |  | 5,678
Property, plant and equipment | ​ |  | 4,628,723 | ​ |  | 3,540,772
Accumulated depreciation | ​ |  | (1,304,893) | ​ |  | (1,238,790)
Property, plant and equipment, net | ​ | $ | 3,323,830 | ​ | $ | 2,301,982
​ Depreciation expense was $185.1 million, $159.3 million and $155.4 million during the years ended December 31, 2024, 2023 and 2022, respectively. Assets under construction of $125.0 million and $64.7 million at December 31, 2024 and 2023, respectively, primarily consisted of compression equipment and other fleet assets.

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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/1943274/2147477798/958-360-50-6 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/1943274/2147477798/958-360-50-1 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/1943274/2147477798/958-360-50-7 + Details
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