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PROPERTY, PLANT AND EQUIPMENT, NET
 6 Months Ended
Jun. 30, 2026
Property, Plant, and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET
4. PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net is summarized as follows:
June 30, 2026December 31, 2025
Land, site improvements and rights$360,555 $513,835 
Buildings and improvements39,322 72,997 
Bridges and tunnels968,640 969,551 
Terminal machinery and equipment1,301,890 1,357,502 
Proved oil and gas properties— 304,716 
Unproved oil and gas properties— 144,455 
Power plant— 850,489 
Track and track related assets347,848 335,850 
Railroad equipment4,238 9,694 
Railcars and locomotives181,955 181,892 
Computer hardware and software22,408 22,532 
Furniture and fixtures2,246 2,246 
Construction in progress360,745 263,495 
Other29,591 30,029 
3,619,438 5,059,283 
Less: Accumulated depreciation(483,898)(477,512)
Property, plant and equipment, net$3,135,540 $4,581,771 
Amounts in the above table do not include assets classified as held for sale on the Consolidated Balance Sheet as of June 30, 2026 (refer to Note 2 for additional details).
Depreciation expense for property, plant and equipment is summarized as follows:
Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Depreciation expense$38,021 $32,576 $87,230 $56,182