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FAIR VALUE MEASUREMENTS AND INVESTMENTS - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Redeemable units	$ 78,715	$ 76,303	$ 83,325	$ 85,917
Redeemable Common Units
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Redeemable units	10,046	10,599	$ 20,504	$ 25,823
Redeemable Common Units | Alloy Inc
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Redeemable units	10,000	10,600
Redeemable Common Units | Alaska Communications
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Fair value of units	0	0
Warrants | Alaska Communications
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Financial instruments	0	(200)
Carrying Value
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Long-term debt	583,400	557,400
Level 2 | Total
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Long-term debt	590,400	564,400
Customer receivable credit facility	39,900	42,700
Level 2 | Carrying Value
FAIR VALUE MEASUREMENTS AND INVESTMENTS
Customer receivable credit facility	$ 40,200	$ 44,200

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