XML 43 R31.htm IDEA: XBRL DOCUMENT v3.25.3
Property, Plant and Equipment (Tables)
 6 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment Property, Plant and Equipment
Our property, plant and equipment consists of the following at the dates indicated:
DescriptionEstimated
Useful Lives		September 30, 2025March 31, 2025
(in years)(in thousands)
Water treatment facilities and equipment (1)3-30$2,266,185 $2,240,919 
Pipeline and related facilities30-40266,324 266,324 
Crude oil tanks and related equipment2-30230,784 230,174 
Buildings and leasehold improvements3-40124,562 124,388 
Natural gas liquids terminal and storage assets2-30100,137 99,805 
Land64,603 64,733 
Tank bottoms and linefill (2) 31,555 30,623 
Information technology equipment3-730,970 31,319 
Vehicles and railcars (3)3-2522,763 33,629 
Other3-2019,269 19,161 
Construction in progress62,310 30,354 
Gross property, plant and equipment3,219,462 3,171,429 
Accumulated depreciation(1,185,359)(1,104,582)
Net property, plant and equipment$2,034,103 $2,066,847 
(1)    Includes finance lease right-of-use assets of $5.8 million at September 30, 2025. Accumulated amortization related to these finance leases is included within accumulated depreciation.
(2)    Tank bottoms, which are product volumes required for the operation of storage tanks, are recorded at historical cost. We recover tank bottoms when the storage tanks are removed from service. Linefill, which represents our portion of the product volume required for the operation of the proportionate share of a pipeline we own, is recorded at historical cost.
(3)    Includes finance lease right-of-use assets of $0.1 million and $0.1 million at September 30, 2025 and March 31, 2025, respectively. Accumulated amortization related to these finance leases is included within accumulated depreciation.

Amounts in the table above do not include assets classified as either held for sale or discontinued operations within our March 31, 2025 consolidated balance sheet (see Note 16).
Schedule of depreciation expense and capitalized interest expense
The following table summarizes depreciation expense and capitalized interest expense for the periods indicated:
Three Months Ended September 30,Six Months Ended September 30,
2025202420252024
(in thousands)
Depreciation expense$50,699 $48,021 $104,116 $95,940 
Capitalized interest expense$146 $963 $230 $1,506 
Schedule of (gains) losses from the sales of property, plant and equipment and any write-downs in value due to impairment The following table summarizes (gains) losses on the disposal or impairment of property, plant and equipment by segment for the periods indicated:
Three Months Ended
September 30, 2025		Six Months Ended
September 30, 2025
(in thousands)
Water Solutions (1)$6,377 $7,871 
Crude Oil Logistics (2)(10)(13)
Liquids Logistics (3)— (13)
Corporate and Other(1)(2)
Total$6,366 $7,843 
(1)    Amount does not include the net loss recognized on the sale of certain investments in unconsolidated entities and related assets during the three months and six months ended September 30, 2025 discussed in Note 15.
(2)    Amount does not include the gain recognized on the sale of certain railcars during the three months and six months ended September 30, 2025 discussed in Note 15.
(3)    Amount does not include the net gains recognized on the Wholesale Propane Disposition and the sale of our refined products business during the three months and six months ended September 30, 2025 discussed in Note 15.