As of December 31, 2025, the estimated useful life (in years) of the Company’s categories of new property and equipment was as follows:
Aircraft (estimated salvage value at 10%-25% of cost)
30
Aircraft accessories and spares
5 - 7
Buildings (estimated salvage value at 10% of cost)
30
Leasehold improvements
lesser of lease term or 10
Other property and equipment
3-15
The following table presents details on the major classes of property and equipment as of (in thousands):
December 31,
20252024
Aircraft$1,037,119 $821,985 
Land and buildings190,021 173,828 
Other property and equipment122,829 109,708 
Construction-in-progress144,587 244,181 
Property and equipment, at cost$1,494,556 $1,349,702 
Less: accumulated depreciation(341,888)(273,481)
Property and equipment, net$1,152,668 $1,076,221 

Historical Timeline

Fiscal YearFiled
2025Feb 26, 2026Showing above
2024Feb 27, 2025
2023Mar 6, 2024
2022May 31, 2022
2021May 27, 2021

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.