REVENUE RECOGNITION AND RECEIVABLES - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Contract Assets and Liabilities
Contract Asset - current	$ 3,465	$ 4,805
Change in contract asset - current	$ (1,340)
% of change in contract asset - current	(28.00%)
Contract Asset - noncurrent	$ 1,095	900
Change in contract asset - noncurrent	$ 195
% of change in contract asset - noncurrent	22.00%
Contract liability- current	$ (26,519)	(25,332)
Change in contract liabilities - current	$ (1,187)
% of change in contract liabilities - current	(5.00%)
Contract liability- noncurrent	$ (74,260)	(81,391)
Change in contract liabilities - noncurrent	$ 7,131
% of change in contract liabilities - Noncurrent	9.00%
Net contract liability	$ (96,219)	$ (101,018)
Change in net contract liability	$ 4,799
% of change in net contract liability	5.00%
Revenue recognized related to contract liability	$ 27,000
Amortization of contract assets	$ 2,500
Retail revenue period for billing postpaid customers in advance	1 month