SEGMENT REPORTING - Segment Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEGMENT REPORTING
Total revenue	$ 1,560,373,000	$ 1,747,856,000	$ 2,003,343,000
Selling, general and administrative expenses:
Subscriber acquisition costs	181,657,000	223,508,000	251,376,000
General and administrative expenses	193,881,000	216,476,000	211,311,000
Total selling, general and administrative expenses	375,538,000	439,984,000	462,687,000
Impairment of long-lived assets and goodwill		532,940,000
OIBDA	196,072,000	(5,349,000)	685,517,000
Depreciation and amortization	365,902,000	389,632,000	431,065,000
Total costs and expenses	1,730,203,000	2,142,837,000	1,748,891,000
Operating income (loss)	(169,830,000)	(394,981,000)	254,452,000
Unallocated Amounts
Interest income	25,393,000	85,036,000	30,812,000
Interest expense, net of amounts capitalized	(98,802,000)	(89,569,000)	(92,386,000)
Other-than-temporary impairment losses on equity method investments		33,400,000
Other, net	(9,024,000)	(32,798,000)	473,000
Total other income (expense)	(82,433,000)	(37,331,000)	(61,101,000)
Income (loss) before income taxes	(252,263,000)	(432,312,000)	193,351,000
Income tax (provision) benefit, net	34,153,000	(46,126,000)	(54,441,000)
Net income (loss)	(218,110,000)	(478,438,000)	138,910,000
Purchases of property and equipment, net of refunds	205,330,000	190,129,000	239,403,000
Service revenue
SEGMENT REPORTING
Total revenue	1,210,840,000	1,448,489,000	1,629,194,000
Cost of services:
Connectivity services	370,473,000	178,295,000	180,033,000
Other	310,548,000	362,650,000	382,816,000
Total cost of services	681,021,000	540,945,000	562,849,000
Equipment sales and other revenue
SEGMENT REPORTING
Total revenue	349,533,000	299,367,000	374,149,000
Cost of services:
Total cost of services	$ 307,742,000	$ 239,336,000	$ 292,290,000