Intangible Assets, Net (Gross and Net Carrying Amounts for each Major Class of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 7,130,569	$ 7,179,789
Accumulated amortization	(4,726,720)	(4,724,192)
Net book value	2,403,849	2,455,597
Current Contract Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,211,395	5,253,563
Accumulated amortization	(3,393,680)	(3,394,009)
Net book value	1,817,715	1,859,554
Network Location Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,919,174	1,926,226
Accumulated amortization	(1,333,040)	(1,330,183)
Net book value	$ 586,134	$ 596,043