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Intangible Assets, Net (Gross and Net Carrying Amounts for each Major Class of Intangible Assets) (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 6,997,321 $ 7,179,789
Accumulated amortization (4,683,083) (4,724,192)
Net book value 2,314,238 2,455,597
Current Contract Intangibles [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 5,096,739 5,253,563
Accumulated amortization (3,353,509) (3,394,009)
Net book value 1,743,230 1,859,554
Network Location Intangibles [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 1,900,582 1,926,226
Accumulated amortization (1,329,574) (1,330,183)
Net book value $ 571,008 $ 596,043