Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value Measurements [Abstract]
Asset impairment	$ 8,920	$ 27,676	$ 61,964	$ 74,372
Write-off of carrying value of decommissioned towers	698	1,619	12,242	4,451
Other (including tower and equipment decommission costs)	3,052	3,768	13,722	13,497
Total asset impairment and decommission costs	$ 12,670	$ 33,063	$ 87,928	$ 92,320

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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