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Intangible Assets, Net (Gross and Net Carrying Amounts for each Major Class of Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 7,517,254 $ 7,061,017
Accumulated amortization (4,792,209) (4,672,310)
Net book value 2,725,045 2,388,707
Current Contract Intangibles [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 5,516,275 5,164,263
Accumulated amortization (3,430,160) (3,338,705)
Net book value 2,086,115 1,825,558
Network Location Intangibles [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 2,000,979 1,896,754
Accumulated amortization (1,362,049) (1,333,605)
Net book value $ 638,930 $ 563,149