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LONG-TERM DEBT (Details)						1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 29, 2024 USD ($)	Jul. 13, 2023 USD ($)	Dec. 23, 2022 USD ($)	Jun. 15, 2022 USD ($)	Apr. 10, 2019 USD ($)	Oct. 31, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Nov. 30, 2023 USD ($) derivative	Nov. 07, 2022 USD ($)	Oct. 12, 2022 USD ($)	May 05, 2022	Mar. 26, 2020 USD ($)	Dec. 31, 2016 USD ($)	Jul. 01, 2016 USD ($)
Long-term debt
Revolving credit facility - borrowings								$ 90,000,000	$ 126,893,000
Loss on extinguishment of debt								760,000
Long-term Debt							$ 568,906,000	568,906,000		$ 516,870,000
Current portion of long-term debt							7,413,000	7,413,000		24,290,000
Long-term debt, excluding current portion							561,493,000	561,493,000		492,580,000
Current portion of customer receivable credit facility							7,935,000	7,935,000		7,110,000
Amortization of financing costs								1,915,000	$ 1,806,000
SOFR | Alaska communications
Long-term debt
Basis spread on variable rate (as a percent)			0.10%
Alaska credit facility
Long-term debt
Financing costs	$ 2,100,000
Alaska credit facility | Period of second quarter of 2024
Long-term debt
Net total leverage ratio			3.75
Alaska credit facility | Interest Rate Swaps
Long-term debt
Notional amount											$ 200,000,000.0
Fair value of asset (liability)							(1,300,000)	$ (1,300,000)		(1,200,000)
Number of derivative instruments | derivative											2
Alaska credit facility | Alaska communications
Long-term debt
Net total leverage ratio			4.00
Fixed charge coverage ratio			1.25
Alaska credit facility | Alaska communications | Period of fourth quarter of 2023 To third quarter 2024
Long-term debt
Periodic payment, principal			$ 1,400,000
Alaska credit facility | SOFR | Interest rate swap One
Long-term debt
Interest rate (in percent)											4.8695%
Alaska credit facility | SOFR | Interest rate swap Two
Long-term debt
Interest rate (in percent)											4.898%
Alaska credit facility | Base rate | Alaska communications
Long-term debt
Basis spread on variable rate (as a percent)			1.00%
Alaska credit facility | Minimum | SOFR | Alaska communications
Long-term debt
Basis spread on variable rate (as a percent)			3.00%
Alaska credit facility | Maximum | SOFR | Alaska communications
Long-term debt
Basis spread on variable rate (as a percent)			4.00%
Alaska Credit Facility 2024
Long-term debt
Financing costs	6,900,000
Net total leverage ratio								4.75
Fixed charge coverage ratio								1.25
Alaska Credit Facility 2024 | Other expense
Long-term debt
Debt costs expensed							3,800,000
Loss on extinguishment of debt							700,000
Alaska Credit Facility 2024 | Period from Second Quarter Of 2027
Long-term debt
Net total leverage ratio								4.50
Alaska Credit Facility 2024 | Period from Third Quarter Of 2028
Long-term debt
Net total leverage ratio								4.25
Alaska Credit Facility 2024 | Debt Instrument from fourth quarter of 2026 to third quarter 2027
Long-term debt
Periodic payment, principal								$ 1,875,000
Alaska Credit Facility 2024 | Debt instrument from fourth quarter of 2027 to second quarter 2029
Long-term debt
Periodic payment, principal								$ 3,750,000
Alaska Credit Facility 2024 | Alaska communications
Long-term debt
Consolidated EBITDA								12 months
One Communications (Guyana)
Long-term debt
Term of debt								5 years
Borrowings outstanding							$ 0	$ 0
Fixed interest rate							7.50%	7.50%
One Communications (Guyana) Term Loan Facility
Long-term debt
Maximum borrowing capacity													$ 2,900,000
One Communications (Guyana) Overdraft Facility
Long-term debt
Maximum borrowing capacity													$ 5,700,000
Viya Debt
Long-term debt
Net leverage ratio														7.0			3.5
Financing costs																$ 900,000
Unamortized financing costs							$ 200,000	$ 200,000
Term loan assumed																	$ 60,000,000.0
Fixed interest rate																4.00%	4.00%
Outstanding debt							60,000,000.0	60,000,000.0
Revolver loan | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity					$ 200,000,000
Repayments of debt		$ 139,500,000
Revolver loan | 2019 CoBank Credit Facility | Minimum
Long-term debt
Commitment fee (as a percent)					0.15%
Revolver loan | 2019 CoBank Credit Facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)					0.25%
Revolver loan | 2019 CoBank Credit Facility | Minimum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)					1.25%
Revolver loan | 2019 CoBank Credit Facility | Maximum
Long-term debt
Commitment fee (as a percent)					0.375%
Revolver loan | 2019 CoBank Credit Facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)					1.25%
Revolver loan | 2019 CoBank Credit Facility | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)					2.25%
Revolver loan | Alaska credit facility | Alaska communications
Long-term debt
Maximum borrowing capacity			$ 75,000,000.0
Revolver loan | Alaska Credit Facility 2024
Long-term debt
Borrowings outstanding							0	0
Remaining borrowing capacity							88,700,000	88,700,000
Revolver loan | Alaska Credit Facility 2024 | Alaska communications
Long-term debt
Maximum borrowing capacity	$ 90,000,000
Letters of credit
Long-term debt
Borrowings outstanding							30,900,000	30,900,000
Letters of credit | 2023 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity		25,000,000
Letters of credit | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity					$ 75,000,000
Letters of credit | Alaska Credit Facility 2024
Long-term debt
Borrowings outstanding							1,300,000	1,300,000
Swingline sub-facility | 2023 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity		$ 20,000,000
Base rate before one-week or one-month LIBOR (as a percent)		1.00%
Swingline sub-facility | 2023 CoBank Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate
Long-term debt
Basis spread on variable rate (as a percent)		0.50%
Swingline sub-facility | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity					$ 10,000,000
Base rate before one-week or one-month LIBOR (as a percent)					1.00%
Swingline sub-facility | 2019 CoBank Credit Facility | Fed Funds Effective Rate Overnight Index Swap Rate
Long-term debt
Basis spread on variable rate (as a percent)					0.50%
Term loans | Alaska credit facility | Alaska communications
Long-term debt
Long-term Debt			$ 230,000,000.0
Term loans | Alaska Credit Facility 2024 | Alaska communications
Long-term debt
Term of debt	5 years
Maximum borrowing capacity	$ 300,000,000
Revolving credit facility - borrowings	$ 279,000,000
Borrowings outstanding							300,000,000.0	300,000,000.0
2023 CoBank Credit Facility
Long-term debt
Financing costs							4,500,000	4,500,000
Unamortized financing costs							3,500,000	3,500,000
2023 CoBank Credit Facility | 2023 CoBank Credit Facility | Interest Rate Swaps
Long-term debt
Derivative, Term of debt						2 years
Notional amount						$ 50,000,000.0
Fair value of asset (liability)							(700,000)	(700,000)		$ (500,000)
2023 CoBank Credit Facility | 2023 CoBank Credit Facility | SOFR | Interest Rate Swaps
Long-term debt
Interest rate (in percent)						4.896%
2023 CoBank Credit Facility | 2023 CoBank Credit Facility | Minimum
Long-term debt
Commitment fee (as a percent)		0.25%
2023 CoBank Credit Facility | 2023 CoBank Credit Facility | Maximum
Long-term debt
Commitment fee (as a percent)		0.50%
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility
Long-term debt
Term of debt		5 years
Maximum borrowing capacity		$ 170,000,000
Revolving credit facility - borrowings		$ 13,600,000
Borrowings outstanding							69,100,000	69,100,000
Remaining borrowing capacity							100,900,000	100,900,000
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility | Minimum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)		1.75%
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)		0.75%
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility | Maximum
Long-term debt
Net leverage ratio		3.25
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility | Maximum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)		3.50%
2023 CoBank Revolving Loan | 2023 CoBank Credit Facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)		2.50%
2023 CoBank Term Loan | 2023 CoBank Credit Facility
Long-term debt
Term of debt		6 years
Face amount of debt		$ 130,000,000
Borrowings outstanding							126,800,000	126,800,000
2023 CoBank Term Loan | 2023 CoBank Credit Facility | Minimum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)		2.00%
2023 CoBank Term Loan | 2023 CoBank Credit Facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)		1.00%
2023 CoBank Term Loan | 2023 CoBank Credit Facility | Maximum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)		3.75%
2023 CoBank Term Loan | 2023 CoBank Credit Facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)		2.75%
Incremental term loans | Alaska Credit Facility 2024 | Minimum | Alaska communications
Long-term debt
Maximum borrowing capacity							91,000,000	91,000,000
Secured delayed draw term loan | Alaska Term Facility | Alaska communications
Long-term debt
Fixed charge coverage ratio				4.0
Maximum borrowing capacity				$ 7,500,000
Senior secured delayed draw term loan | Receivable credit facility
Long-term debt
Maximum borrowing capacity															$ 75,000,000.0
Financing costs															$ 800,000
Unamortized financing costs							400,000	400,000
Borrowings outstanding							46,600,000	46,600,000
Remaining borrowing capacity							9,200,000	9,200,000
Current portion of customer receivable credit facility							7,900,000	7,900,000
Senior secured delayed draw term loan | Sacred Wind Term Debt
Long-term debt
Long-term Debt							25,800,000	25,800,000				$ 31,600,000
Current portion of long-term debt							3,400,000	3,400,000
Long-term debt, excluding current portion							$ 22,400,000	$ 22,400,000
Senior secured delayed draw term loan | Sacred Wind Term Debt | Minimum
Long-term debt
Fixed interest rate							0.88%	0.88%
Senior secured delayed draw term loan | Sacred Wind Term Debt | Maximum
Long-term debt
Fixed interest rate							5.00%	5.00%

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