Leases - Schedule of Underlying Assets under Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Lessor Lease Description [Line Items]
Underlying assets under operating leases, gross	$ 9,237,646	$ 9,017,798
Less: accumulated depreciation	(5,941,191)	(5,852,579)
Underlying assets under operating leases, net	3,296,455	3,165,219
Land
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	26,737	26,711
Building and improvements
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	352,176	350,829
Poles
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	351,977	341,548
Fiber
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	4,430,631	4,222,895
Equipment
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	437	437
Copper
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	3,973,498	3,972,806
Conduit
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	90,214	90,193
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	1,486	1,889
Other assets
Lessor Lease Description [Line Items]
Property, plant, and equipment, lessor asset under operating lease, before accumulated depreciation	$ 10,432	$ 10,432