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Intangible Assets, Goodwill and Other (Tables)
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
The following is a summary of the Company's intangible assets.
As of December 31, 2024
As of December 31, 2023
Gross Carrying ValueAccumulated AmortizationNet Book ValueGross Carrying ValueAccumulated AmortizationNet Book Value
Site rental contracts and tenant relationships
$7,879 $(5,152)$2,727 $7,880 $(4,758)$3,122 
Other intangible assets113 (59)54 113 (56)57 
Total$7,992 $(5,211)$2,781 $7,993 $(4,814)$3,179 
Schedule of Estimated Annual Amortization Expense
The estimated annual amortization expense related to intangible assets for the years ending December 31, 2025 to 2029 is as follows:
 Years Ending December 31,
20252026202720282029
Estimated annual amortization$375 $371 $288 $284 $284 
Schedule of Goodwill
The change in the carrying value of goodwill for the years ended December 31, 2024 and 2023 is as follows:

Towers
Fiber
Total
Balance as of December 31, 2023
$5,127 $4,958 $10,085 
Impairment
— (4,958)(4,958)
Balance as of December 31, 2024
$5,127 $— $5,127