GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) item	Mar. 31, 2023 USD ($)	Jul. 15, 2022 USD ($)
Mobility Fund [Line Items]
Revenue from contract with customer	$ 172,908	$ 172,557
Reimbursable capital expenditures	13,473	2,127
Amounts accrued for reimbursable capital expenditures from government capital programs	33,446	1,435
Government capital programs - Amounts received	10,546	593
Payment for PALs	573
USF, CAF II, RDOF, EOF, RHC and Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	29,046	26,978
USF, CAF II, RDOF, EOF, RHC and Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	27,338	25,577
USF, CAF II, RDOF, EOF, RHC and Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	$ 1,708	1,401
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	$ 4,848	3,891
High cost support program | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,455	2,494
High cost support program | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,393	1,397
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
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
CAF II | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,787	6,815
CAF II | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,787	6,815
TBCP and Reconnect
Mobility Fund [Line Items]
Grant funds awarded during the period	192,600
Government capital programs - Amounts received	10,400
Construction Obligation	10,100
RDOF
Mobility Fund [Line Items]
Grant Funds Expected To Be Awarded	$ 22,700
Grant Fund Term	10 years
Number Of Households To Receive Broadband Coverage | item	10,000
RDOF | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	$ 145	608
RDOF | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	145	608
ECF | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,813	8,067
ECF | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,813	8,067
RHC | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,437	2,900
RHC | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	3,437	2,900
Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	7,016	4,697
Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,701	4,693
Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	$ 315	4
Remove And Replace Program
Mobility Fund [Line Items]
Reimbursement period	12 months
Receivable for costs expected to be reimbursed	$ 49,134	$ 6,710
Amounts accrued for reimbursable capital expenditures from government capital programs	33,400
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	3,400
Government capital programs - Amounts received	$ 1,900