GOVERNMENT SUPPORT AND SPECTRUM MATTERS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) item	Jun. 30, 2022 USD ($)	Apr. 30, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jul. 15, 2022 USD ($)	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)
Mobility Fund [Line Items]
Revenue from contract with customer	$ 173,438	$ 166,547	$ 345,996	$ 326,460
USF, CAF II, RDOF and Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	25,415	17,239	52,394	33,432
USF, CAF II, RDOF and Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	24,013	14,456	49,590	27,873
USF, CAF II, RDOF and Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,402	2,783	$ 2,804	5,559
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	3,619	3,750	$ 7,511	7,567
High cost support program | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	2,222	989	4,716	2,045
High cost support program | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	1,397	2,761	2,795	5,522
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	6,815	6,822	13,630	13,644
CAF II | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	6,815	6,822	13,630	13,644
TBCP
Mobility Fund [Line Items]
Grant funds awarded during the period			139,000
Vija's annual USF support
Mobility Fund [Line Items]
Amount that has been funded or will be funded								$ 10,900	$ 16,400
Vija's annual USF support | Grant Receivable July 2022 Through June 2023
Mobility Fund [Line Items]
Amount that has been funded or will be funded						$ 5,500
Vija's annual USF support | Grant Receivable July 2023 Through December 2025
Mobility Fund [Line Items]
Amount that has been funded or will be funded					$ 5,500
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
RDOF | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	608	478	$ 1,216	956
RDOF | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	608	478	1,216	956
Other Programs | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	14,373	6,189	30,037	11,265
Other Programs | US Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	14,368	6,167	30,028	11,228
Other Programs | International Telecom | Communication services
Mobility Fund [Line Items]
Revenue from contract with customer	5	$ 22	9	$ 37
Remove And Replace Program
Mobility Fund [Line Items]
Receivable for costs expected to be reimbursed	$ 21,000		$ 21,000
Remove And Replace Program | Maximum
Mobility Fund [Line Items]
Amount of cost reimbursement allocated							$ 207,000