Property and Equipment, Net (Property and Equipment, Net) (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 7,812,206 | $ 7,762,561 |
| Less: accumulated depreciation | (4,410,392) | (4,360,762) |
| Property and equipment, net | 3,401,814 | 3,401,799 |
| Towers and Related Assets [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 6,597,811 | 6,606,764 |
| Construction-In-Process [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 92,759 | 72,794 |
| Furniture, Equipment and Vehicles [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 106,108 | 97,984 |
| Land, Buildings and Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 1,015,528 | $ 985,019 |