LONG-TERM DEBT (Details) $ in Thousands					1 Months Ended	9 Months Ended
	Jul. 13, 2023 USD ($)	Dec. 23, 2022 USD ($)	Jul. 22, 2021 USD ($)	Apr. 10, 2019 USD ($)	Oct. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) derivative	Sep. 30, 2022 USD ($)	Nov. 08, 2023 USD ($) derivative	Dec. 31, 2022 USD ($)	Nov. 07, 2022 USD ($)	Oct. 22, 2022 USD ($)	Jun. 15, 2022 USD ($)	May 05, 2022	Mar. 26, 2020 USD ($)	Dec. 31, 2016 USD ($)	Jul. 01, 2016 USD ($)
Long-term debt
Outstanding borrowings						$ 498,377			$ 421,900
Current portion of long-term debt						21,278			6,173
Long-term debt, excluding current portion						477,099			415,727
Current portion of customer receivable credit facility						6,727			$ 6,073
Revolving credit facility - borrowings						$ 126,893	$ 68,000
Alaska credit facility | SOFR
Long-term debt
Percentage of adjustment to applicable interest rate		0.10%
One Communications Debt | Minimum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)						2.50%
One Communications Debt | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)						2.75%
GTT Credit Facility
Long-term debt
Term of debt						5 years
Stated interest rate						7.50%
GTT Term Loan Facility
Long-term debt
Maximum borrowing capacity											$ 2,900
Borrowings outstanding						$ 0
GTT Overdraft Facility
Long-term debt
Maximum borrowing capacity											$ 5,700
Borrowings outstanding						3,500
Viya Debt
Long-term debt
Term loan assumed																$ 60,000
Net leverage ratio													7.0			3.5
Stated interest rate															4.00%	4.00%
Financing costs															$ 900
Outstanding debt						60,000
Unamortized financing costs						300
Revolver loan | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity				$ 200,000
Repayments of debt	$ 139,500
Revolver loan | 2019 CoBank Credit Facility | Minimum
Long-term debt
Commitment fee (as a percent)				0.15%
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 | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)				0.25%
Revolver loan | 2019 CoBank Credit Facility | Maximum
Long-term debt
Commitment fee (as a percent)				0.375%
Revolver loan | 2019 CoBank Credit Facility | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)				2.25%
Revolver loan | 2019 CoBank Credit Facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)				1.25%
Letter of credit sub-facility
Long-term debt
Borrowings outstanding						31,600
Letter of credit sub-facility | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity				$ 75,000
Letter of credit sub-facility | 2023 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity	25,000
Swingline sub-facility | 2019 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity				$ 10,000
Base rate before one-week or one-month LIBOR (as a percent)				1.00%
Swingline sub-facility | 2019 CoBank Credit Facility | Federal Funds Effective Rate
Long-term debt
Basis spread on variable rate (as a percent)				0.50%
Swingline sub-facility | 2023 CoBank Credit Facility
Long-term debt
Maximum borrowing capacity	$ 20,000
Base rate before one-week or one-month LIBOR (as a percent)	1.00%
Swingline sub-facility | 2023 CoBank Credit Facility | Federal Funds Effective Rate
Long-term debt
Basis spread on variable rate (as a percent)	0.50%
2023 CoBank Credit Facility
Long-term debt
Financing costs						4,000
Unamortized financing costs						3,800
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
Maximum borrowing capacity	$ 170,000
Remaining borrowing capacity						146,900
Borrowings outstanding						23,100
Term of debt	5 years
Revolving credit facility - borrowings	$ 13,600
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
Face amount of debt	$ 130,000
Borrowings outstanding						130,000
Term of debt	6 years
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%
Senior secured delayed draw term loan | Receivable credit facility
Long-term debt
Maximum borrowing capacity														$ 75,000
Remaining borrowing capacity						18,000
Current portion of customer receivable credit facility						6,700
Borrowings outstanding						45,300
Financing costs						800
Unamortized financing costs						500
Senior secured delayed draw term loan | Sacred Wind Term Debt
Long-term debt
Outstanding borrowings						29,000				$ 31,600
Current portion of long-term debt						3,200
Long-term debt, excluding current portion						$ 25,800
Senior secured delayed draw term loan | Sacred Wind Term Debt | Minimum
Long-term debt
Stated interest rate						0.88%
Senior secured delayed draw term loan | Sacred Wind Term Debt | Maximum
Long-term debt
Stated interest rate						5.00%
Interest rate swap | 2023 CoBank Credit Facility
Long-term debt
Number of derivative instruments | derivative						0
Subsequent event | 2023 CoBank Term Loan | 2023 CoBank Credit Facility | SOFR
Long-term debt
Basis spread on variable rate (as a percent)					4.896%
Derivative, Term of debt					2 years
Notional amount					$ 50,000
Subsequent event | Interest rate swap | Alaska credit facility
Long-term debt
Number of derivative instruments | derivative								2
Subsequent event | Interest rate swap | Alaska credit facility | SOFR
Long-term debt
Notional amount								$ 200,000
Subsequent event | Interest rate swap | Alaska credit facility | Minimum | SOFR
Long-term debt
Interest rate (in percent)								4.8695%
Subsequent event | Interest rate swap | Alaska credit facility | Maximum | SOFR
Long-term debt
Interest rate (in percent)								4.898%
Subsequent event | Interest rate swap | 2023 CoBank Credit Facility | 2023 CoBank Credit Facility | SOFR
Long-term debt
Basis spread on variable rate (as a percent)					4.896%
Derivative, Term of debt					2 years
Notional amount					$ 50,000
Alaska communications | Alaska credit facility
Long-term debt
Fixed charge coverage ratio			1.25
Net total leverage ratio			4.00
Financing costs						$ 7,300
Unamortized financing costs						4,200
Consolidated EBITDA			12 months
Alaska communications | Alaska credit facility | SOFR
Long-term debt
Percentage of adjustment to applicable interest rate			0.10%
Alaska communications | Alaska credit facility | Base rate
Long-term debt
Basis spread on variable rate (as a percent)			1.00%
Alaska communications | Alaska credit facility | Minimum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)			3.00%
Alaska communications | Alaska credit facility | Maximum | SOFR
Long-term debt
Basis spread on variable rate (as a percent)			4.00%
Alaska communications | Revolver loan | Alaska credit facility
Long-term debt
Maximum borrowing capacity		$ 75,000	$ 35,000
Remaining borrowing capacity						50,000
Revolving credit facility - borrowings						25,000
Alaska communications | Term loans | Alaska credit facility
Long-term debt
Outstanding borrowings		$ 230,000	210,000
Borrowings outstanding						230,000
Alaska communications | Secured delayed draw term loan | Alaska credit facility
Long-term debt
Maximum borrowing capacity												$ 7,500
Remaining borrowing capacity						0
Outstanding borrowings						$ 6,400
Stated interest rate												4.00%
Alaska communications | Incremental term loans | Alaska credit facility | Minimum
Long-term debt
Maximum borrowing capacity			$ 70,000
Alaska communications | Designated as cash flow hedges | Interest rate swap
Long-term debt
Interest rate (in percent)			1.6735%
Period of fourth quarter of 2023 To third quarter 2024 | Alaska communications | Alaska credit facility
Long-term debt
Periodic payment, principal			$ 1,400
Debt Instrument, From Fourth Quarter of 2024 To Third Quarter of 2026 | Alaska communications | Alaska credit facility
Long-term debt
Periodic payment, principal			$ 2,900
Period of second quarter of 2024 | Alaska communications | Alaska credit facility
Long-term debt
Net total leverage ratio			3.75