Property and Equipment, Net (Property and Equipment, Net (Including Assets Held Under Capital Leases)) (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 6,034,590 | $ 5,985,780 |
| Less: accumulated depreciation | (3,366,586) | (3,191,178) |
| Property and equipment, net | 2,668,004 | 2,794,602 |
| Towers and Related Components [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 5,142,440 | 5,164,104 |
| Construction-In-Process [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 36,642 | 33,644 |
| Furniture, Equipment and Vehicles [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 51,545 | 51,654 |
| Land, Buildings and Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 803,963 | $ 736,378 |