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PROPERTY, PLANT AND EQUIPMENT | 3 Months Ended
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Mar. 31, 2024
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT | PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following (in thousands):
| March 31, 2024 |  | December 31, 2023
Land | $ | 184,242 |  |  | $ | 174,891 |
Asset retirement costs (non-landfill) | 27,155 |  |  | 27,167 |
Landfill assets | 252,816 |  |  | 253,180 |
Buildings and improvements (1) | 639,514 |  |  | 630,525 |
Vehicles (2) | 1,345,995 |  |  | 1,276,567 |
Equipment (3) | 2,391,075 |  |  | 2,388,370 |
Construction in progress | 263,878 |  |  | 213,601 |
| 5,104,675 |  |  | 4,964,301 |
Less - accumulated depreciation and amortization | 2,774,191 |  |  | 2,770,983 |
Total property, plant and equipment, net | $ | 2,330,484 |  |  | $ | 2,193,318 |
________________ (1) Balances inclusive of gross right-of-use (“ROU”) assets classified as finance leases of $8.0 million in both periods. (2) Balances inclusive of gross ROU assets classified as finance leases of $175.0 million and $151.7 million, respectively. (3) Balances inclusive of gross ROU assets classified as finance leases of $9.2 million in both periods. Depreciation expense, inclusive of landfill and finance lease amortization, was $82.2 million and $72.0 million for the three months ended March 31, 2024 and March 31, 2023, respectively. The Company recorded $2.5 million and $1.2 million of capitalized interest during the three months ended March 31, 2024 and March 31, 2023, respectively, mainly attributable to the construction of a new incinerator in Kimball, Nebraska.

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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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