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Property, Plant, and Equipment
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment PROPERTY, PLANT, AND EQUIPMENT
At December 31, 2024 and 2023, property, plant and equipment consisted of the following:
 Depreciable Lives20242023
Land—$18,812 $18,818 
Improvements to land and buildings
10-25 years
136,609 133,440 
Storage equipment
5-50 years
130,663 129,456 
Marine vessels
4-25 years
194,406 187,182 
Operating plant and equipment
3-50 years
396,631 376,170 
Furniture, fixtures and other equipment
3-20 years
7,908 7,527 
Transportation equipment
3-7 years
43,807 47,017 
Construction in progress 25,223 19,176 
  $954,059 $918,786 

Depreciation expense for the years ended December 31, 2024, 2023 and 2022 was $41,604, $44,700 and $50,186, respectively, which includes amortization of fixed assets acquired under finance ease obligations of $11, $6, and $92. Gross assets under finance leases were $77 and $0 at December 31, 2024 and 2023, respectively. Accumulated amortization associated with finance leases was $10 and $0 at December 31, 2024 and 2023, respectively.

Additions to property, plant and equipment included in accounts payable at December 31, 2024, 2023 and 2022 were $2,661, $2,943, and $1,949, respectively. No equipment was purchased under finance lease obligations for the years ended December 31, 2024, 2023, and 2022.