SUPPLEMENTAL FINANCIAL INFORMATION - Accrued Expenses and Other Current Liabilities and Other Non-Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Accrued expenses and other current liabilities:
Accrued compensation	$ 49,144	$ 56,337
Operating lease obligation	17,717	17,854
Accrued interest	38,277	39,245
Accrued taxes	14,094	12,603
Accrual for license fee dispute	10,285	10,191
In-orbit incentive obligations	4,536	5,369
Trade accounts payable	91,118	101,239
Accrued expenses	43,553	39,875
Other	20,641	17,710
Total accrued expenses and other current liabilities	199,086	199,853
Other non-current liabilities:
Accrual for license fee dispute	49,996	57,292
In-orbit incentive obligations	43,209	44,836
Contract liabilities	6,738	8,326
Other	9,356	9,333
Total other non-current liabilities	$ 109,299	$ 119,787
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued expenses and other current liabilities	Total accrued expenses and other current liabilities
Related Party
Accrued expenses and other current liabilities:
Trade accounts payable	$ 839	$ 669