Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the related assets or the lease term, if shorter, as follows:
  Years
Buildings and leasehold improvements 
20 to 45 or the lease term if shorter
Machinery and production equipment 
3 to 18
Transportation equipment 
3 to 12
Property, plant and equipment, net as of the fiscal years ended March 31 consisted of the following:
(Amounts in thousands)20252024
Land, buildings and improvements$405,417 $355,394 
Machinery and production equipment1,033,820933,494
Transportation equipment246,431167,114
Construction in progress190,515165,756
Total cost1,876,1831,621,758
Less: accumulated depreciation(825,143)(745,407)
Property, plant and equipment, net$1,051,040 $876,351 

Historical Timeline

Fiscal YearFiled
2025May 15, 2025Showing above
2017May 30, 2017

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.