Property, Plant and Equipment - Table (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 1,158,456	$ 1,028,233
Less: accumulated depreciation and amortization	517,049	474,071
Property, plant and equipment, net	641,407	554,162
Land
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 3,771	3,771
Land improvements
Property, plant and equipment [Abstract]
Estimated Useful Lives	10 years
Total property, plant and equipment	$ 3,483	3,478
Buildings and structures
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 97,321	96,323
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	$ 558,340	453,405
Cable and fiber | Minimum
Property, plant and equipment [Abstract]
Estimated Useful Lives	15 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	$ 370,620	391,293
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	8 years
Plant in service
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 1,033,535	948,270
Plant under construction
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 124,921	$ 79,963