REVENUE RECOGNITION AND RECEIVABLES - Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts Receivable
Gross accounts receivable	$ 137,000	$ 131,400
Allowance for credit loss	16,100	13,900
Customer receivable, current	4,813	4,145
Customer receivable - long term	43,382	39,652
FirstNet agreement
Accounts Receivable
Customer receivable	48,200	43,800
Customer receivable, current	4,800	4,100
Customer receivable - long term	$ 43,400	$ 39,700