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Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Fair Value Measurements [Abstract] |  |  |
Asset impairment | $ 73,848 | $ 139,466 | $ 34,734
Right-of-use asset impairment |  | 45,100 |
Write-off of carrying value of decommissioned towers | 15,452 | 12,015 | 8,095
Other (including tower and equipment decommission costs) | 18,625 | 17,906 | 331
Total asset impairment and decommission costs | $ 107,925 | $ 169,387 | $ 43,160

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