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Debt (Secured Tower Revenue Securities) (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) site | Dec. 31, 2023 USD ($)
Debt Instrument [Line Items] |  |
Principal Balance | $ 13,672,750 | $ 12,388,000
2024 Tower Securities [Member] |  |
Debt Instrument [Line Items] |  |
Aggregate amount | $ 8,400,000 |
Property management fee percentage | 4.50% |
U.S. Treasury rate term | 10 years |
Additional interest rate for non-compliance | 5.00% |
Interest added to Treasury rate and credit-based spread for non-compliance | 5.00% |
Tower Securities 2019-1C, 2020-1C, 2021-1C, 2021-2C and 2020-1C [Member] |  |
Debt Instrument [Line Items] |  |
No prepayment consideration period | 12 months |
Tower Securities 2014-2C, 2020-2C and 2021-3C [Member] |  |
Debt Instrument [Line Items] |  |
No prepayment consideration period | 18 months |
Minimum [Member] | 2024 Tower Securities [Member] |  |
Debt Instrument [Line Items] |  |
Aggregate number of tower sites owned by Borrowers | site | 9,516 |
Excess Cash Flow Reserve [Member] | Minimum [Member] | 2024 Tower Securities [Member] |  |
Debt Instrument [Line Items] |  |
Debt service coverage ratio | 1.30 |
Amortization Period Prepay [Member] | Maximum [Member] | 2024 Tower Securities [Member] |  |
Debt Instrument [Line Items] |  |
Debt service coverage ratio | 1.15 |
Advance Rents Reserve [Member] | 2024 Tower Securities [Member] |  |
Debt Instrument [Line Items] |  |
Debt service coverage ratio | 2 |
Term required to maintain reserve if debt service coverage ratio is exceeded | 2 months |

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