Property, Plant and Equipment - Schedule of Carrying Value of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 9,605,865
Property, plant, and equipment and finance lease right-of-use asset	9,605,865	$ 9,250,151
Less accumulated depreciation	(5,912,284)	(5,741,212)
Net property, plant and equipment	3,693,581	3,508,939
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	28,678	28,449
Building and improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 361,592	359,980
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	$ 293,504	281,130
Fiber
Property Plant And Equipment [Line Items]
Depreciable Lives	30 years
Property, plant and equipment, gross	$ 4,354,532	4,107,519
Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 375,340	331,761
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	$ 3,955,180	3,918,281
Conduit
Property Plant And Equipment [Line Items]
Depreciable Lives	30 years
Property, plant and equipment, gross	$ 89,925	89,859
Tower assets
Property Plant And Equipment [Line Items]
Depreciable Lives	20 years
Property, plant and equipment, gross	$ 8,544	8,544
Finance lease assets
Property Plant And Equipment [Line Items]
Finance lease assets	73,203	72,284
Other assets
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 10,451	10,652
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
Corporate assets
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 14,775	14,326
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
Construction in progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 40,141	$ 27,366