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ORGANIZATION AND BUSINESS OPERATIONS - Acquisition of Alaska Communications (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
	Jul. 22, 2021	Sep. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Borrowings		$ 27,540
Alaska communications
Line of Credit Facility [Line Items]
Cash consideration	$ 339,500
Mezzanine equity contribution received from Freedom 3 Investors	$ 71,500
Ownership interest (as a percent)	52.00%
Transaction costs	$ 8,100		$ 800
Alaska credit facility | Alaska communications
Line of Credit Facility [Line Items]
Borrowings	$ 220,000

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