Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 2,053,097	$ 1,980,111
Less: accumulated depreciation and amortization	(569,301)	(541,573)
Property, plant and equipment, net	1,483,796	1,438,538
Total plant in service
Property, plant and equipment [Abstract]
Total property, plant and equipment	1,812,402	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	$ 3,717	3,717
Buildings and structures
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 53,565	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	$ 1,329,123	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	$ 421,483	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	$ 240,695	$ 207,428