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GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) item	Jun. 30, 2023 USD ($)	Jul. 15, 2022 USD ($)
Mobility Fund [Line Items]
Revenue from contract with customer	$ 169,366	$ 173,438	$ 342,274	$ 345,996
Reimbursable capital expenditures			46,198	6,986
Amounts accrued for reimbursable capital expenditures from government capital programs			27,418	11,296
Government capital programs - Amounts received			43,686	593
USF, CAF II, RDOF, EOF, RHC and Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	17,847	25,415	46,892	52,394
USF, CAF II, RDOF, EOF, RHC and Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	16,299	24,013	43,636	49,590
USF, CAF II, RDOF, EOF, RHC and Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,548	1,402	$ 3,256	2,804
Universal Service Fund programs
Mobility Fund [Line Items]
Number of fund disbursement programs | item			4
High cost support program | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	4,876	3,619	$ 9,723	7,511
High cost support program | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,483	2,222	6,937	4,716
High cost support program | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,393	1,397	2,786	2,795
Government capital programs - Amounts received			5,500
CAF II | Grant receivable through December 2025
Mobility Fund [Line Items]
Amount that has been funded or will be funded	27,700		27,700
CAF II | Grant receivable from January 2026 through July 2028
Mobility Fund [Line Items]
Amount that has been funded or will be funded	8,000		8,000
CAF II | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,784	6,815	13,571	13,630
CAF II | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,784	6,815	13,571	13,630
E-ACAM
Mobility Fund [Line Items]
Amount that has been funded or will be funded	118,200		$ 118,200
Grant fund term			15 years
E-ACAM | Grant receivable from 2024 through 2030
Mobility Fund [Line Items]
Amount that has been funded or will be funded	9,000		$ 9,000
E-ACAM | Grant receivable in year 2038
Mobility Fund [Line Items]
Amount that has been funded or will be funded	6,000		6,000
TBCP and Reconnect
Mobility Fund [Line Items]
Grant funds awarded during the period			192,600
Government capital programs - Amounts received			11,300
Construction Obligation			11,400
RDOF
Mobility Fund [Line Items]
Grant funds expected to be awarded	22,700		$ 22,700
Grant fund term			10 years
Number of households to receive broadband coverage | item			10,000
Transfer of obligation under pending approval of regulatory	13,000		$ 13,000
RDOF | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	145	608	290	1,216
RDOF | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	145	608	290	1,216
ECF | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	498	6,813	7,312	14,880
ECF | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	498	6,813	7,312	14,880
RHC | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,682	2,887	7,119	5,787
RHC | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,682	2,887	7,119	5,787
Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,862	4,673	8,877	9,370
Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,707	4,668	8,407	9,361
Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	$ 155	$ 5	$ 470	$ 9
Remove And Replace Program
Mobility Fund [Line Items]
Reimbursement period			12 months
Amounts accrued for reimbursable capital expenditures from government capital programs			$ 27,300
Remove And Replace Program | Maximum
Mobility Fund [Line Items]
Amount of cost reimbursement allocated					$ 207,000
Network Connectivity for Eligible Communities
Mobility Fund [Line Items]
Reimbursable capital expenditures			3,600
Grant funds awarded during the period			0
Government capital programs - Amounts received			$ 2,300

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