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FIXED ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fixed Assets
Total plant in service	$ 1,856,362	$ 1,899,463
Total property, plant, and equipment	2,128,921	2,092,278
Less: Accumulated depreciation	(1,088,728)	(1,011,619)
Net fixed assets	1,040,193	1,080,659
Depreciation and amortization	138,300	141,600	$ 135,100
Capital expenditure reimbursements	95,800	31,900
Capitalized implementation costs	10,900	8,100
Amortization of implementation costs	2,100	2,200
Proceeds from sale of assets	18,609		$ 1,067
Gain (loss) on disposal of fixed asset	13,300
Disposal | Non-core fixed asset
Fixed Assets
Net fixed assets	500
Proceeds from sale of assets	17,800
Gain (loss) on disposal of fixed asset	15,500
Transaction costs	1,800
US Telecom
Fixed Assets
Gain (loss) on disposal of fixed asset	$ (2,500)
Minimum
Fixed Assets
Useful Life	3 years
Maximum
Fixed Assets
Useful Life	39 years
Telecommunications equipment and towers
Fixed Assets
Total plant in service	$ 1,571,145	1,539,533
Finance leases, cost	51,400	36,100
Finance leases, net	$ 29,600	8,700
Telecommunications equipment and towers | Minimum
Fixed Assets
Useful Life	5 years
Telecommunications equipment and towers | Maximum
Fixed Assets
Useful Life	15 years
Office and computer equipment
Fixed Assets
Total plant in service	$ 112,371	148,693
Office and computer equipment | Minimum
Fixed Assets
Useful Life	3 years
Office and computer equipment | Maximum
Fixed Assets
Useful Life	10 years
Buildings
Fixed Assets
Total plant in service	$ 100,533	138,243
Buildings | Minimum
Fixed Assets
Useful Life	15 years
Buildings | Maximum
Fixed Assets
Useful Life	39 years
Transportation vehicles
Fixed Assets
Total plant in service	$ 20,335	27,480
Transportation vehicles | Minimum
Fixed Assets
Useful Life	3 years
Transportation vehicles | Maximum
Fixed Assets
Useful Life	10 years
Leasehold improvements
Fixed Assets
Total plant in service	$ 16,902	22,424
Land
Fixed Assets
Total plant in service	25,887	11,652
Furniture and fixtures
Fixed Assets
Total plant in service	$ 9,189	11,438
Furniture and fixtures | Minimum
Fixed Assets
Useful Life	5 years
Furniture and fixtures | Maximum
Fixed Assets
Useful Life	10 years
Construction in progress
Fixed Assets
Total property, plant, and equipment	$ 272,559	$ 192,815

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