Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 2,122,629	$ 1,980,111
Less: accumulated depreciation and amortization	(598,635)	(541,573)
Property, plant and equipment, net	1,523,994	1,438,538
Total plant in service
Property, plant and equipment [Abstract]
Total property, plant and equipment	1,892,910	1,772,683
Land
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 4,514	4,514
Land improvements
Property, plant and equipment [Abstract]
Estimated Useful Lives	10 years
Total property, plant and equipment	$ 3,777	3,717
Buildings and structures
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 53,509	52,706
Buildings and structures \| Minimum
Property, plant and equipment [Abstract]
Estimated Useful Lives	10 years
Buildings and structures \| Maximum
Property, plant and equipment [Abstract]
Estimated Useful Lives	45 years
Cable and fiber
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 1,385,739	1,294,689
Cable and fiber \| Minimum
Property, plant and equipment [Abstract]
Estimated Useful Lives	12 years
Cable and fiber \| Maximum
Property, plant and equipment [Abstract]
Estimated Useful Lives	30 years
Equipment and software
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 445,371	417,057
Equipment and software \| Minimum
Property, plant and equipment [Abstract]
Estimated Useful Lives	4 years
Equipment and software \| Maximum
Property, plant and equipment [Abstract]
Estimated Useful Lives	12 years
Plant under construction
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 229,719	$ 207,428