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Property, Plant and Equipment - Table (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 1,109,408	$ 1,028,233
Less: accumulated depreciation and amortization	499,623	474,071
Property, plant and equipment, net	609,785	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	$ 96,287	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	$ 528,352	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	$ 361,290	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	$ 993,183	948,270
Plant under construction
Property, plant and equipment [Abstract]
Total property, plant and equipment	$ 116,225	$ 79,963

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