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FIXED ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fixed Assets
Total plant in service	$ 1,899,463	$ 1,841,295
Total property, plant, and equipment	2,092,278	1,977,978
Less: Accumulated depreciation	(1,011,619)	(922,024)
Net fixed assets	1,080,659	1,055,954
Depreciation and amortization	141,600	135,100	$ 102,700
Capital expenditure grants	31,900	2,900
Capitalized implementation costs	8,100	5,600
Amortization of implementation costs	$ 2,200	1,900
Minimum
Fixed Assets
Useful Life	3 years
Maximum
Fixed Assets
Useful Life	39 years
Telecommunications equipment and towers
Fixed Assets
Total plant in service	$ 1,539,533	1,479,633
Capital leased assets, cost	36,100	26,600
Capital leased assets, net	$ 8,700	$ 13,700
Telecommunications equipment and towers | Minimum
Fixed Assets
Useful Life	5 years	5 years
Telecommunications equipment and towers | Maximum
Fixed Assets
Useful Life	15 years	15 years
Office and computer equipment
Fixed Assets
Total plant in service	$ 148,693	$ 151,804
Office and computer equipment | Minimum
Fixed Assets
Useful Life	3 years	3 years
Office and computer equipment | Maximum
Fixed Assets
Useful Life	10 years	10 years
Buildings
Fixed Assets
Total plant in service	$ 138,243	$ 136,145
Buildings | Minimum
Fixed Assets
Useful Life	15 years	15 years
Buildings | Maximum
Fixed Assets
Useful Life	39 years	39 years
Transportation vehicles
Fixed Assets
Total plant in service	$ 27,480	$ 27,879
Transportation vehicles | Minimum
Fixed Assets
Useful Life	3 years	3 years
Transportation vehicles | Maximum
Fixed Assets
Useful Life	10 years	10 years
Leasehold improvements
Fixed Assets
Total plant in service	$ 22,424	$ 22,934
Land
Fixed Assets
Total plant in service	11,652	11,308
Furniture and fixtures
Fixed Assets
Total plant in service	$ 11,438	$ 11,592
Furniture and fixtures | Minimum
Fixed Assets
Useful Life	5 years	5 years
Furniture and fixtures | Maximum
Fixed Assets
Useful Life	10 years	10 years
Construction in progress
Fixed Assets
Total property, plant, and equipment	$ 192,815	$ 136,683

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