Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements [Abstract]
Asset impairment	$ 73,848	$ 139,466	$ 34,734
Right-of-use asset impairment		45,100
Write-off of carrying value of decommissioned towers	15,452	12,015	8,095
Other (including tower and equipment decommission costs)	18,625	17,906	331
Total asset impairment and decommission costs	$ 107,925	$ 169,387	$ 43,160