Property, Plant and Equipment - Schedule of Carrying Value of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 10,566,494	$ 10,201,409
Less accumulated depreciation	(6,409,952)	(6,219,340)
Net property, plant and equipment	4,156,542	3,982,069
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	30,507	30,099
Building and improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	371,600	$ 366,490
Building and improvements | Minimum
Property Plant And Equipment [Line Items]
Depreciable Lives		3 years
Building and improvements | Maximum
Property Plant And Equipment [Line Items]
Depreciable Lives		40 years
Poles
Property Plant And Equipment [Line Items]
Depreciable Lives		30 years
Property, plant and equipment, gross	333,447	$ 314,489
Fiber
Property Plant And Equipment [Line Items]
Depreciable Lives		30 years
Property, plant and equipment, gross	5,148,425	$ 4,835,623
Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	493,096	$ 460,463
Equipment | Minimum
Property Plant And Equipment [Line Items]
Depreciable Lives		5 years
Equipment | Maximum
Property Plant And Equipment [Line Items]
Depreciable Lives		7 years
Copper
Property Plant And Equipment [Line Items]
Depreciable Lives		20 years
Property, plant and equipment, gross	3,973,887	$ 3,974,410
Conduit
Property Plant And Equipment [Line Items]
Depreciable Lives		30 years
Property, plant and equipment, gross	90,117	$ 90,087
Tower assets
Property Plant And Equipment [Line Items]
Depreciable Lives		20 years
Property, plant and equipment, gross	1,221	$ 1,221
Finance lease assets
Property Plant And Equipment [Line Items]
Finance lease assets	52,824	52,589
Other assets
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	10,435	$ 10,436
Other assets | Minimum
Property Plant And Equipment [Line Items]
Depreciable Lives		15 years
Other assets | Maximum
Property Plant And Equipment [Line Items]
Depreciable Lives		20 years
Construction in progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	44,620	$ 49,771
Corporate assets
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 16,315	$ 15,731
Corporate assets | Minimum
Property Plant And Equipment [Line Items]
Depreciable Lives		3 years
Corporate assets | Maximum
Property Plant And Equipment [Line Items]
Depreciable Lives		7 years