Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Fair Value Measurements [Abstract]
Asset impairment	$ 40,575	$ 18,491	$ 71,041	$ 53,043
Write-off of carrying value of decommissioned towers	3,358	7,440	5,919	11,545
Other (including tower and equipment decommission costs)	1,298	5,679	5,297	10,670
Total asset impairment and decommission costs	$ 45,231	$ 31,610	$ 82,257	$ 75,258

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
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Section 45
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