Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fair Value Measurements [Abstract] | ||||
| Asset impairment | $ 13,009 | $ 40,575 | $ 35,436 | $ 71,041 |
| Write-off of carrying value of decommissioned towers | 8,251 | 3,358 | 11,739 | 5,919 |
| Other (including tower and equipment decommission costs) | 1,306 | 1,298 | 4,692 | 5,297 |
| Total asset impairment and decommission costs | $ 22,566 | $ 45,231 | $ 51,867 | $ 82,257 |