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Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Property, plant and equipment [Abstract]    
Total property, plant and equipment $ 1,389,696 $ 1,327,820
Less: accumulated depreciation and amortization (493,488) (477,483)
Property, plant and equipment, net 896,208 850,337
Land    
Property, plant and equipment [Abstract]    
Total property, plant and equipment $ 3,671 3,671
Land improvements    
Property, plant and equipment [Abstract]    
Estimated Useful Lives 10 years  
Total property, plant and equipment $ 4,448 4,448
Buildings and structures    
Property, plant and equipment [Abstract]    
Total property, plant and equipment $ 43,027 42,871
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 $ 833,360 799,612
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 $ 348,677 331,595
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 $ 1,233,183 1,182,197
Plant under construction    
Property, plant and equipment [Abstract]    
Total property, plant and equipment $ 156,513 $ 145,623