Leases - Schedule of Underlying Assets under Operating Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Lessor Lease Description [Line Items]
Underlying assets under operating leases, gross	$ 8,914,145	$ 8,628,671
Less: accumulated depreciation	(5,812,265)	(5,690,066)
Underlying assets under operating leases, net	3,101,880	2,938,605
Land
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	26,518	26,533
Building and improvements
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	348,683	347,700
Poles
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	333,447	314,488
Fiber
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	4,128,677	3,862,635
Equipment
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	437	436
Copper
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	3,973,887	3,974,410
Conduit
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	90,117	90,087
Tower assets
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	58	58
Finance lease assets
Lessor Lease Description [Line Items]
Finance lease assets	1,889	1,890
Other assets
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	$ 10,432	$ 10,434