v3.25.4
Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Note 9 Property, Plant and Equipment
Property, plant and equipment in service and under construction, and related accumulated depreciation and amortization, as of December 31, 2025 and 2024, were as follows:
December 31,Useful Lives (Years)20252024
(Dollars in thousands)   
Land N/A $44,257 $41,737 
Leasehold and land improvements
 1-30
321,542 317,038 
Communications infrastructure assets
 7-30
696,918 667,401 
Other operating assets and equipment
 5-8
2,866 2,768 
System development
 3-5
3,032 2,743 
Work in process N/A 10,391 5,958 
Total property, plant and equipment, gross 1,079,006 1,037,645 
Accumulated depreciation and amortization (690,007)(653,624)
Total property, plant and equipment, net $388,999 $384,021 
Depreciation and amortization expense totaled $39.1 million, $38.8 million and $41.7 million in 2025, 2024 and 2023, respectively.